Mug shot of Nilsen taken after his arrest in February 1983
Dennis Andrew Nilsen
23 November 1945
|Died||12 May 2018 (aged 72)|
|Criminal penalty||Life imprisonment (whole life tariff)|
Span of crimes
|30 December 1978–26 January 1983|
|9 February 1983|
Dennis Andrew Nilsen (23 November 1945 – 12 May 2018) was a Scottish serial killer and necrophile who murdered at least twelve young men and boys between 1978 and 1983 in London, England. Convicted at the Old Bailey of six counts of murder and two of attempted murder, Nilsen was sentenced to life imprisonment on 4 November 1983, with a recommendation that he serve a minimum of twenty-five years. This recommendation was later changed to a whole life tariff. In his later years, he was imprisoned at Full Sutton maximum security prison.
All of Nilsen's murders were committed at the two North London addresses where he resided between 1978 and 1983. His victims would be lured to these addresses by guile, and killed by strangulation, sometimes accompanied by drowning. Following each murder, Nilsen would observe a ritual in which he bathed and dressed the victim's body, which he retained for extended periods of time, before dissecting and disposing of the remains by burning on a bonfire or flushing down a lavatory.
Nilsen became known as the Muswell Hill Murderer, as he committed his later murders in the Muswell Hill district of North London. He died at York Hospital on 12 May 2018 of a pulmonary embolism and a retroperitoneal haemorrhage, which occurred following surgery to repair an abdominal aortic aneurysm.
Dennis Andrew Nilsen was born on 23 November 1945 in Fraserburgh, Aberdeenshire, the second of three children born to Elizabeth Duthie Whyte, and Olav Magnus Moksheim (who had adopted the surname Nilsen). His father was a Norwegian soldier who had travelled to Scotland in 1940 as part of the Free Norwegian Forces, following the German occupation of Norway. After a brief courtship, he married Elizabeth Whyte in May 1942 and the newlyweds moved into her parents' house.
The marriage between Nilsen's parents was difficult. Olav Nilsen did not view married life with any seriousness, being preoccupied with his duties with the Free Norwegian Forces, and making little attempt to spend much time with or find a new home for his wife. After the birth of her third child, Nilsen's mother concluded she had "rushed into marriage without thinking". The couple divorced in 1948. All three of the couple's children—Olav Jr., Dennis and Sylvia—had been conceived on their father's brief visits to the mother's household. Her parents, Andrew and Lily (née Duthie) Whyte (who had never approved of their daughter's choice of husband), were supportive of their daughter following her divorce, and considerate of their grandchildren.
Nilsen was a quiet yet adventurous child. His earliest childhood memories were of family picnics in the Scottish countryside with his mother and siblings, of his grandparents' pious lifestyle (which he later described as "cold and dour"), and of being taken on long countryside walks carried on the shoulders of his maternal grandfather, to whom he was particularly close. Olav Jr. and Sylvia occasionally accompanied Dennis and his grandfather on these walks. Despite only being 5 years old, Nilsen vividly recalled these walks as being "very long ... along the harbour, across the wide stretch of beach, up to the sand-dunes, which rise thirty feet behind the beach ... and on to Inverallochy". He later described this stage of his childhood as one of contentment, and his grandfather being his "great hero and protector", adding that whenever his grandfather (who was a fisherman) was at sea, "Life would be empty [for me] until he returned".
By 1951, Nilsen's grandfather's health was in decline, but he continued to work. On 31 October 1951, while fishing in the North Sea, he died of a heart attack at the age of 62. His body was brought ashore and returned to the Nilsen family home prior to burial. In what Nilsen later described as his most vivid childhood recollection, his mother, weeping, asked him whether he wanted to see his grandfather. When he replied that he did, he was taken into the room where his grandfather lay in an open coffin. As he gazed upon the body, his mother told him his grandfather was sleeping, adding that his grandfather had "gone to a better place".
In the years following the death of his grandfather, Nilsen became more quiet and withdrawn, often standing alone at the harbour watching the herring boats. At home, he seldom participated in family activities and retreated from any attempts by adult family members to demonstrate any affection towards him. He grew to resent what he saw as the unfair amount of attention his mother, grandmother and later, stepfather displayed towards his older brother and younger sister. Nilsen envied Olav's popularity. He often talked to or played games with his younger sister, Sylvia, to whom he was closer than any other family member.
On one of his solo excursions to the beach at Inverallochy, in 1954 or 1955, Nilsen became submerged beneath the water and was almost dragged out to sea. He initially panicked, flailing his arms and shouting. As he "gasped for air which wasn't there" he recalled believing that his grandfather was about to arrive and pull him out, before experiencing a sense of tranquillity. His life was saved by another youth who dragged him ashore.
Shortly after this incident, Nilsen's mother moved out of his grandparents' home and into a flat with her three children. She later married a builder named Andrew Scott, with whom she had four more children in as many years. Although Nilsen initially resented his stepfather (whom he viewed as an unfair disciplinarian), he gradually came to grudgingly respect him. The family moved to Strichen in 1955.
At the onset of puberty, Nilsen discovered he was homosexual, which initially confused and shamed him. He kept his sexuality hidden from his family and his few friends. Because many of the boys to whom he was attracted had facial features similar to those of his younger sister, Sylvia, on one occasion he sexually fondled her, believing that his attraction towards boys might be a manifestation of the care he felt for her. He made no efforts to seek sexual contact with any of the peers to whom he was sexually attracted, although he later said he had been fondled by an older youth and did not find the experience unpleasant. On one occasion, he also caressed and fondled the body of his older brother as he slept. As a result of this, Olav Jr. began to suspect his brother was homosexual and regularly belittled him in public—referring to Dennis as "hen" (Scottish dialect for "girl"). Nilsen initially believed that his fondling of his sister may have been evidence that he was bisexual.
As Nilsen progressed into adolescence, he found life in Strichen increasingly stifling, with limited entertainment amenities or career opportunities. He respected his parents' efforts to provide and care for their children, but began to resent the fact that his family was poorer than most of his peers, with his mother and stepfather making no effort to better their lifestyles; thus, Nilsen seldom invited his friends to the family home. At the age of 14, he joined the Army Cadet Force, viewing the British Army as a potential avenue for escaping his rural origins.
Nilsen's scholastic record was above average. He displayed a flair for both history and art, but shunned sports. He finished his schooling in 1961 and briefly worked in a canning factory as he considered which career path he should choose. After three weeks at the factory, Nilsen informed his mother that he intended to join the army, where he intended to train as a chef. Nilsen passed the entrance examinations and received official notification he was to enlist for nine years' service in September 1961, commencing his training with the Army Catering Corps at St. Omer Barracks in Aldershot. Within weeks, Nilsen began to excel in his army duties; he later described his three years of training at Aldershot as "the happiest of my life". He relished the travel opportunities afforded him in his training, and recalled as a highlight his regiment taking part in a ceremonial parade attended by both The Queen and Field Marshal Lord Montgomery of Alamein.
While stationed at Aldershot, Nilsen's latent homosexual feelings began to stir, but he kept his sexual orientation well hidden from his colleagues. Nilsen never showered in the company of his fellow soldiers for fear of developing an erection in their presence; instead opting to bathe alone in the bathroom, which also afforded him the privacy to masturbate without discovery.
In mid-1964, Nilsen passed his initial catering exam and was officially assigned to the 1st Battalion of the Royal Fusiliers in Osnabrück, West Germany, where he served as a private. In this deployment, Nilsen began to increase his intake of alcohol. He described himself and his colleagues as a "hard-working, boozy lot"; his colleagues recalled he often drank to excess in order to ease his shyness. On one occasion, Nilsen and a German youth drank themselves into a stupor. When Nilsen awoke, he found himself on the floor of the German youth's flat. No sexual activity had occurred, but this incident fuelled Nilsen's sexual fantasies, which initially involved his sexual partner—invariably a young, slender male—being completely passive. These fantasies gradually evolved into his partner being unconscious or dead. On several occasions, Nilsen also made tentative efforts to have his own prone body sexually interfered with by one of his colleagues. In these instances, whenever he and his colleagues drank to excess, Nilsen would pretend he was inebriated in the hope one of his colleagues would make sexual use of his supposedly unconscious body.
Following two years of service in Osnabrück, Nilsen returned to Aldershot, where he passed his official catering exam before being deployed to serve as a cook for the British Army in Norway. In 1967, he was deployed to the State of Aden (formerly Aden Colony), where he again served as a cook at the Al Mansoura Prison. This posting was more dangerous than his previous postings in West Germany or Norway, and Nilsen later recalled his regiment losing several men, often in ambushes en route to the army barracks. Nilsen was kidnapped by an Arab taxi driver, who beat him unconscious and placed him in the boot of his car. Upon being dragged out of the boot of the taxi, Nilsen grabbed a jack-handle and knocked the taxi driver to the floor before beating him unconscious. He then locked the man in the boot of the taxi.
Unlike his previous postings, Nilsen had his own room while stationed in Aden. This afforded him the privacy to masturbate without discovery. His developed fantasies of sex with an unresistant or deceased partner unfulfilled, Nilsen compensated by imagining sexual encounters with an unconscious body as he masturbated while looking at his own prone, nude body in a mirror. On one occasion, Nilsen discovered that, by using a free-standing mirror, he could create an effect whereby if positioning the mirror so his head was out of view, he could visualise himself engaged in a sexual act with another man. To Nilsen, this ruse created the ideal circumstance in which he could visually "split" his personality: in these masturbatory fantasies, Nilsen alternately envisaged himself as being both the domineering and the passive partner. These fantasies gradually evolved to incorporate his own near-death experience with the Arab taxi driver, the dead bodies he had seen in Aden, and imagery within a 19th-century oil painting entitled The Raft of the Medusa, which depicts an old man holding the limp, nude body of a dead youth as he sits aside the dismembered body of another young male. In his most vividly recalled fantasy, a slender, attractive young blond soldier who had been recently killed in battle is dominated by a faceless "dirty, grey-haired old man" who washed this body before engaging in intercourse with the spreadeagled corpse.
When Nilsen completed his deployment in Aden he returned to Britain and was assigned to serve with the Argyll and Sutherland Highlanders at Seaton Barracks in Plymouth. Throughout his service with this regiment, Nilsen was required to cook for thirty soldiers and two officers on a daily basis. He served at these barracks for one year before being transferred with the Argyll and Sutherland Highlanders to Cyprus in 1969. Months later, the regiment was transferred to Berlin, where, the same year, Nilsen had his first sexual experience with a female: a prostitute whose services he solicited. He bragged of this sexual encounter to his colleagues, but later stated he found intercourse with a female both "over-rated" and "depressing".[n 1]
Following a brief period with the Argyll and Sutherland Highlanders in Inverness, Nilsen was selected to cook for the Queen's Royal Guard before, in January 1971, being reassigned to serve as a cook for a different regiment in the Shetland Islands, where he ended his 11-year military career at the rank of corporal in October 1972.[n 2]
Between October and December 1972, Nilsen lived with his family as he considered his next career move. On more than one occasion in the three months Nilsen lived in Strichen, his mother voiced her opinion as to her being more concerned with Nilsen's lack of female companionship than his career path, and of her desire to see him marry and start a family. On one occasion, Nilsen joined his older brother Olav Jr., his sister-in-law, and another couple to watch a documentary about male homosexuality. All present viewed the topic with derision, except Dennis, who ardently spoke in defence of gay rights. A fight ensued, after which Olav Jr. informed his mother that Dennis was homosexual. Dennis never spoke to his older brother again, and maintained only sporadic written contact with his mother, stepfather and younger siblings. He decided to join the Metropolitan Police, and moved to London in December to begin the training course.
In April 1973 Nilsen completed his training and was posted to Willesden Green. As a junior constable, Nilsen performed several arrests but never had to physically subdue a member of the public. Nilsen enjoyed the work, but missed the comradeship of the army. He began to drink alone in the evenings. During the summer and autumn of 1973, Nilsen began frequenting gay pubs and engaged in several casual liaisons with men. He viewed these encounters as "soul-destroying" liaisons in which he "would only lend" his partner his body in a "vain search for inner peace" as he sought a lasting relationship. In August, following a failed relationship, Nilsen came to the conclusion that his personal lifestyle was at odds with his professional life. His birth father died the same month, leaving each of his three children £1,000. In December, Nilsen resigned from the police.
Between December 1973 and May 1974, Nilsen worked as a security guard. The work was intermittent, and he resolved to find more stable, secure employment. He found work as a civil servant in May 1974. Nilsen was initially posted to a Jobcentre in Denmark Street, where his primary role was to find employment for unskilled labourers. At his workplace, Nilsen was known to be a quiet, conscientious employee, who was active in the trade union movement. His attendance record was mediocre, although he frequently volunteered to work overtime. In 1979, Nilsen was appointed acting executive officer. He was officially promoted to the position of executive officer, with additional supervisory responsibilities, in June 1982, and transferred to another Jobcentre in Kentish Town, continuing in this job until his arrest.
In November 1975, Nilsen encountered a 20-year-old man named David Gallichan being threatened outside a pub by two other men. Nilsen intervened in the altercation and took Gallichan to his room at 80 Teignmouth Road in the Cricklewood district of London. The two men spent the evening drinking and talking; Nilsen learned that Gallichan had recently moved to London from Weston-super-Mare, was homosexual, unemployed and resided in a hostel. The following morning, both men agreed to live together in a larger residence and Nilsen—using part of the inheritance bequeathed to him by his father—immediately resolved to find a larger property. Several days later, the pair viewed a vacant ground floor flat at 195 Melrose Avenue, also in Cricklewood, and they decided to move into the property. Prior to moving into Melrose Avenue, Nilsen negotiated a deal with the landlord whereby he and Gallichan had exclusive use of the garden at the rear of the property.
The flat was supposed to be furnished, but upon moving in, Nilsen and Gallichan found it to be largely threadbare. Over the following months, Nilsen and Gallichan redecorated and furnished the entire flat. Much of this work was performed by Gallichan, as Nilsen—having discovered Gallichan's lack of employment ambitions—began to view himself as the breadwinner in their relationship. Nilsen later recollected that he was sexually attracted to Gallichan, but the pair seldom had intercourse.[n 3]
Initially, Nilsen experienced domestic contentment with Gallichan; however, within a year of their moving to Melrose Avenue, the superficial relationship between the two men began to show signs of strain. They slept in separate beds, and both began to bring home casual sexual partners. Gallichan insisted Nilsen had never been violent towards him, but he was regularly berated by Nilsen, and by early 1976, the pair began arguing with increasing frequency. Nilsen later stated that following a heated argument in May 1977, he demanded Gallichan leave the residence. (Gallichan later informed investigators that he had chosen to end the relationship.) Nilsen formed brief relationships with several other young men over the following eighteen months; none of these relationships lasted more than a few weeks, and none of the men expressed any intention of living with Nilsen on a permanent basis.
By late 1978, Nilsen was living a solitary existence; he had experienced at least three failed relationships in the previous eighteen months, and he later confessed to having developed an increasing conviction that he was unfit to live with. Throughout 1978, he devoted an ever-increasing amount of his time, effort and assiduity to his work, and most evenings he spent consuming spirits and/or lager as he listened to music.
Between 1978 and 1983, Nilsen is known to have killed a minimum of twelve men and boys, and to have attempted to kill seven others (he initially confessed in 1983 to having killed fifteen victims). The majority of Nilsen's victims were homeless or homosexual men; others were heterosexual people he typically met in bars, on public transport or—on one occasion—outside his own home. All of Nilsen's murders were committed inside the two North London addresses where he resided in the years he is known to have killed. His victims were lured to these addresses through guile—typically the offer of alcohol and/or shelter.
Inside Nilsen's home, the victims were usually given food and alcohol, then strangled—typically with a ligature—either to death or until they had become unconscious. If the victim had been strangled into unconsciousness, Nilsen then drowned him in his bathtub, his sink or a bucket of water before observing a ritual in which he bathed, clothed and retained the bodies inside his residences for several weeks or, occasionally, months before he dismembered them. Each victim killed between 1978 and 1981 at his Cricklewood residence was disposed of via burning upon a bonfire. Prior to their dissection, Nilsen removed their internal organs, which he disposed of either beside a fence behind his flat, or close to Gladstone Park. The victims killed in 1982 and 1983 at his Muswell Hill residence were retained at his flat, with their flesh and smaller bones flushed down the lavatory.
Nilsen admitted to engaging in masturbation as he viewed the nude bodies of several of his victims, and to have engaged in sexual acts with six of his victims' bodies, but was adamant he had never penetrated any of his victims.
Nilsen killed his first victim, 14-year-old Stephen Holmes, on 30 December 1978. Holmes encountered Nilsen in the Cricklewood Arms pub, where Holmes had unsuccessfully attempted to purchase alcohol. According to Nilsen, he had been drinking heavily alone on the day he met Holmes, before deciding in the evening he must "at all costs" leave his flat and seek company. He invited Holmes to his house with the promise of the two drinking alcohol and listening to music, believing him to be approximately 17 years old. At Nilsen's home, both Nilsen and Holmes drank heavily before they fell asleep. The following morning, Nilsen awoke to find Holmes asleep on his bed. In his subsequent written confessions, Nilsen stated he was "afraid to wake him in case he left me". After caressing the sleeping youth, Nilsen decided Holmes was to "stay with me over the New Year whether he wanted to or not". Reaching for a necktie, Nilsen straddled Holmes as he strangled him into unconsciousness, before drowning the teenager in a bucket filled with water. Nilsen then washed the body in his bathtub before placing Holmes on his bed and caressing his body. He twice masturbated over the body, before awaiting the passing of rigor mortis to enable him to stow the corpse beneath his floorboards. Holmes' bound corpse remained beneath the floorboards for almost eight months, before Nilsen built a bonfire in the garden behind his flat and burned his body on 11 August 1979.
Nilsen's written recollections of the ritual he observed after the murder of his first victim.
Reflecting on his killing spree in 1983, Nilsen stated that, having killed Holmes: "I caused dreams which caused death ... this is my crime", adding that he had "started down the avenue of death and possession of a new kind of flatmate".[n 4]
On 11 October 1979, Nilsen attempted to murder a student from Hong Kong named Andrew Ho, whom he had met in a St Martin's Lane pub and lured to his flat on the promise of sex. Nilsen attempted to strangle Ho, who managed to flee from his flat and reported the incident to police. Nilsen was questioned in relation to the incident, but Ho decided not to press charges.
Two months after the attempted murder of Ho, on 3 December 1979, Nilsen encountered a 23-year-old Canadian student named Kenneth Ockenden, who had been on a tour of England visiting relatives. Nilsen encountered Ockenden as they both drank in a West End pub. Upon learning the youth was a tourist, Nilsen offered to show Ockenden several London landmarks, an offer which Ockenden accepted. Nilsen then invited the youth to his house on the promise of a meal and further drinks. The pair stopped at an off licence en route to Nilsen's residence and purchased whisky, rum, and beer, with Ockenden insisting on sharing the bill. Nilsen was adamant he could not recall the precise moment he strangled Ockenden, but recalled that he strangled the youth with the cord of his (Nilsen's) headphones as Ockenden listened to music. He also recalled dragging the youth across his floor with the wire wrapped around his neck as he strangled him, before pouring himself half a glass of rum and continuing to listen to music upon the headphones with which he had strangled Ockenden.
The following day, Nilsen purchased a Polaroid camera and photographed Ockenden's body in various suggestive positions. He then laid Ockenden's corpse spreadeagled above him on his bed as he watched television for several hours, before wrapping the body in plastic bags and stowing the corpse beneath the floorboards. On approximately four occasions over the following fortnight, Nilsen disinterred Ockenden's body from beneath his floorboards and seated the body upon his armchair alongside him as he himself watched television and drank alcohol.
Nilsen killed his third victim, 16-year-old Martyn Duffey, on 17 May 1980. Duffey was a catering student from Birkenhead, who had hitchhiked to London without his parents' knowledge on 13 May after being questioned by the British Transport Police for evading his train fare. For four days, Duffey had slept rough near Euston railway station before Nilsen encountered the youth as he returned from a union conference in Southport. Duffey, Nilsen recollected, was both exhausted and hungry, and happily accepted Nilsen's offer of a meal and a bed for the evening. After the youth had fallen asleep in Nilsen's bed, Nilsen fashioned a ligature around his neck, then simultaneously sat on Duffey's chest and tightened the ligature with a "great force". Nilsen held this grip until Duffey became unconscious; he then dragged the youth into his kitchen and drowned him in his sink before bathing with the body—which he recollected as being "the youngest-looking I had ever seen."
Duffey's body was first placed upon a kitchen chair, then upon the bed on which he had been strangled. The body was repeatedly kissed, complimented and caressed by Nilsen, both before and after he had masturbated while sitting upon the stomach of the corpse. For two days, Duffey's body was stowed in a cupboard, before Nilsen noted signs of bloating; therefore, "he went straight under the floorboards".
Following Duffey's murder, Nilsen began to kill with increasing frequency. Before the end of 1980, he killed a further five victims and attempted to murder one other; only one of these victims whom Nilsen murdered, 26-year-old William David Sutherland, has ever been identified. Nilsen's recollections of the unidentified victims were vague, but he graphically recalled how each victim had been murdered and just how long the body had been retained before dissection. One unidentified victim killed in November had moved his legs in a cycling motion as he was strangled (Nilsen is known to have absented himself from work between 11 and 18 November, likely due to this particular murder); another unidentified victim Nilsen had unsuccessfully attempted to resuscitate, before sinking to his knees and sobbing, before standing to expressly spit at his own image as he looked at himself in the mirror. On another occasion, he had lain in bed alongside the body of an unidentified victim as he listened to the classical theme Fanfare for the Common Man before bursting into tears.
Inevitably, the accumulated bodies beneath his floorboards attracted insects and created a foul odour—particularly throughout summer months. On occasions when Nilsen disinterred victims from beneath the floorboards, he noted that the bodies were covered with pupae and infested with maggots; some victims' heads had maggots crawling out of eye sockets and mouths. Nilsen placed deodorants beneath the floorboards and sprayed insecticide about the flat twice daily, but the odour of decay and the presence of flies remained.
In late 1980, Nilsen removed and dissected the bodies of each victim killed since December 1979 and burned them upon a communal bonfire he had constructed on waste ground behind his flat. To disguise the smell of the burning flesh of the six dissected bodies placed upon this pyre, Nilsen crowned the bonfire with an old car tyre. Three neighbourhood children stood to watch this particular bonfire, and Nilsen later wrote in his memoirs that he felt it would have seemed "in order" if he had seen these three children "dancing around a mass funeral pyre". When the bonfire had been reduced to ashes and cinders, Nilsen used a rake to search the debris for any recognisable bones. Noting a skull was still intact, he smashed it to pieces with his rake.
On or about 4 January 1981, Nilsen encountered an unidentified man whom he described for investigators as an "18-year-old, blue-eyed" young Scot at the Golden Lion pub in Soho; he was lured to Melrose Avenue upon the promise of partaking in a drinking contest. After Nilsen and this victim had consumed several beverages, Nilsen strangled him with a tie, and subsequently placed the body beneath the floorboards. Nilsen is known to have informed his employers he was ill and unable to attend work on 12 January in order that he could dissect both this victim and another unidentified victim he had killed approximately one month earlier. By April, Nilsen had killed two further unidentified victims: one of whom he described as an English skinhead whom he had met in Leicester Square; the other he described as "Belfast boy"; a man in his early 20s, approximately 5 ft 9 in (1.75 m) height. In relation to the first of these three unidentified victims, Nilsen later casually reflected: "End of the day, end of the drink, end of a person ... floorboards back, carpet replaced, and back to work at Denmark Street".
The final victim to be murdered at Melrose Avenue was 23-year-old Malcolm Barlow, whom Nilsen discovered slumped against a wall outside his home on 17 September 1981. When Nilsen enquired as to Barlow's welfare, he was informed the medication Barlow was prescribed for his epilepsy had caused his legs to weaken. Nilsen suggested that Barlow should be in hospital and, supporting him, walked him into his residence before phoning for an ambulance. The following day, Barlow was released from hospital and returned to Nilsen's home, apparently to thank him. He was invited in and, after eating a meal, began drinking rum and coke before falling asleep on the sofa. Nilsen manually strangled Barlow as he slept, before stowing his body beneath his kitchen sink the following morning.
In mid-1981, Nilsen's landlord decided to renovate 195 Melrose Avenue, and asked Nilsen to vacate the property. Nilsen was initially resistant to the proposal, but accepted an offer of £1,000 from his landlord to vacate the residence. He moved into an attic flat at 23D Cranley Gardens in the Muswell Hill district of north London on 5 October 1981. The day before he vacated the property, Nilsen burned the dissected bodies of the last five victims he had killed at this address upon a third and final bonfire he constructed in the garden behind his flat. Again, Nilsen ensured the bonfire was crowned with an old car tyre to disguise the smell of burning flesh (Nilsen had already dissected the bodies of four of these victims in January and August, and only needed to complete the dissection of Barlow for this third bonfire).
At Cranley Gardens, Nilsen had no access to a garden, and as he resided in an attic flat, he was unable to stow any bodies beneath his floorboards. For almost two months, any acquaintances Nilsen encountered and lured to his flat were not assaulted in any manner, although he did attempt to strangle a 19-year-old student named Paul Nobbs on 23 November 1981, but stopped himself from completing the act.[n 5]
In March 1982, Nilsen encountered 23-year-old John Howlett while drinking in a pub near Leicester Square. Howlett was lured to Nilsen's flat on the promise of continuing drinking with Nilsen. There, both Nilsen and Howlett drank as they watched a film, before Howlett walked into Nilsen's front room and fell asleep in the bed (which was located in the front room at this time). One hour later, Nilsen unsuccessfully attempted to rouse Howlett, then sat on the edge of the bed drinking rum as he stared at Howlett, before deciding to kill him. Following a ferocious struggle (in which Howlett himself attempted to strangle his attacker), Nilsen strangled Howlett into unconsciousness with an upholstery strap before returning to his living room, shaking from the "stress of the struggle" in which he had believed he would be overpowered. On three occasions over the following ten minutes, Nilsen unsuccessfully attempted to kill this victim after noting he had resumed breathing, before deciding to fill his bathtub with water and drown him. For over a week following Howlett's murder, Nilsen's own neck bore the victim's finger impressions.
In May 1982, Nilsen encountered Carl Stottor, a 21-year-old homosexual, as the youth drank at the Black Cap pub in Camden. Nilsen engaged Stottor in conversation, discovering the youth was depressed following a failed relationship. After plying the youth with alcohol, Nilsen invited Stottor to his flat, assuring his guest he had no intention of sexual activity. At the flat, Stottor consumed further alcohol before falling asleep upon an open sleeping bag; he later awoke to find himself being strangled with Nilsen loudly whispering, "Stay still".
In his subsequent testimony at Nilsen's trial, Stottor stated he initially believed Nilsen was trying to free him from the zip of the sleeping bag, before he returned to a state of unconsciousness. He then vaguely recalled hearing "water running" before realising he was immersed in the water and that Nilsen was attempting to drown him. After briefly succeeding in raising his head above the water, Stottor gasped the words, "No more, please! No more!" before Nilsen again submerged Stottor's head beneath the water.
Believing he had killed Stottor, Nilsen seated the youth in his armchair, then noted his mongrel dog, Bleep, licking Stottor's face. Nilsen realised the tiniest thread of life still clung in the youth: he rubbed Stottor's limbs and heart to increase circulation, covered the youth's body in blankets, then laid him upon his bed. When Stottor regained consciousness, Nilsen embraced him; he then explained to Stottor he had almost strangled himself on the zip of the sleeping bag, and that he had resuscitated him. Over the following two days, Stottor repeatedly lapsed in and out of consciousness. When Stottor had regained enough strength to question Nilsen as to his recollections of being strangled and immersed in cold water, Nilsen explained he had become caught in the zip of the sleeping bag following a nightmare, and that he had placed him in cold water as "you were in shock". Nilsen then led Stottor to a nearby railway station, where he informed the youth he hoped they might meet again before he bade him farewell.
Three months after Nilsen's June 1982 promotion to the position of executive officer in his employment, he encountered a 27-year-old named Graham Allen attempting to hail a taxi in Shaftesbury Avenue. Allen accepted Nilsen's offer to accompany him to Cranley Gardens for a meal. As had been the case with several previous victims, Nilsen stated he could not recall the precise moment he had strangled Allen, but recalled approaching him as he sat eating an omelette with the full intention of murdering him. Allen's body was retained in the bathtub for a total of three days before Nilsen began the task of dissecting his body upon the kitchen floor. Nilsen is again known to have informed his employers he was ill and unable to attend work on 9 October 1982—likely in order that he could complete the dissection of Allen's body.
On 26 January 1983, Nilsen killed his final victim, 20-year-old Stephen Sinclair. Sinclair was last seen by acquaintances in the company of Nilsen, walking in the direction of a tube station. At Nilsen's flat, Sinclair fell asleep in a drug- and alcohol-induced stupor in an armchair as Nilsen sat listening to the rock opera Tommy. Nilsen approached Sinclair, knelt before him and said to himself, "Oh Stephen, here I go again", before strangling Sinclair with a ligature constructed with a necktie and a rope. Noting crepe bandages upon each of Sinclair's wrists, Nilsen removed these to discover several deep slash marks from where Sinclair had recently tried to kill himself.
Following his usual ritual of bathing the body, Nilsen laid Sinclair's body upon his bed, applied talcum powder to the body, then arranged three mirrors around the bed before himself lying naked alongside the dead youth. Several hours later, he turned Stephen's head towards him, before kissing the youth's body on the forehead and saying, "Goodnight, Stephen". Nilsen then fell asleep alongside the body. As had been the case with both Howlett and Allen, Sinclair's body was subsequently dissected, with various dismembered parts wrapped in plastic bags and stored in either a wardrobe, a tea chest or within a drawer located beneath the bathtub. The bags used to seal Sinclair's remains were sealed with the same crepe bandages Nilsen had found upon Sinclair's wrists. Nilsen attempted to dispose of the flesh, internal organs and smaller bones of all three victims killed at Cranley Gardens by flushing their dissected remains down his toilet. In a practice which he had conducted upon several victims killed at Melrose Avenue, he also boiled the heads, hands and feet to remove the flesh off these sections of the victims' bodies.
On 4 February 1983, Nilsen wrote a letter of complaint to estate agents complaining that the drains at Cranley Gardens were blocked, and that the situation for both himself and the other tenants at the property was intolerable. The following day, he refused to allow an acquaintance to enter his property (the reason being he had begun to dismember Sinclair's body on the floor of his kitchen).
Nilsen's murders were first discovered by a Dyno-Rod employee, Michael Cattran, who responded to the plumbing complaints made by both Nilsen and other tenants of 23 Cranley Gardens on 8 February 1983. Opening a drain cover at the side of the house, Cattran discovered the drain was packed with a flesh-like substance and numerous small bones of unknown origin. Cattran reported his suspicions to his supervisor, Gary Wheeler. As Cattran had arrived at the property at dusk, he and Wheeler agreed to postpone further investigation into the blockage until the following morning. Prior to leaving the property, Nilsen and a fellow tenant convened with Cattran to discuss the source of the substance. Upon hearing Cattran exclaim how similar the substance was in appearance to human flesh, Nilsen replied: "It looks to me like someone has been flushing down their Kentucky Fried Chicken."
At 7:30 a.m. the following morning, Cattran and Wheeler returned to 23 Cranley Gardens, by which time the drain had been cleared. This aroused the suspicions of both men. Cattran discovered some scraps of flesh and four bones in a pipe leading from the drain which linked to the top flat of the house. To both Cattran and Wheeler, the bones looked as if they originated from a human hand. Both men immediately called the police who, upon closer inspection, discovered further small bones and scraps of what looked to the naked eye like either human or animal flesh in the same pipe. These remains were taken to the mortuary at Hornsey, where pathologist Professor David Bowen advised police that the remains were human, and that one particular piece of flesh he concluded had been from a human neck bore a ligature mark.
Upon learning from fellow tenants that the top floor flat from where the human remains had been flushed belonged to Nilsen, Detective Chief Inspector Peter Jay and two colleagues opted to wait outside the house until Nilsen returned home from work. When Nilsen returned home, DCI Jay introduced himself and his colleagues; explaining they had come to enquire about the blockage in the drains from his flat. Nilsen asked why the police were interested in his drains and also whether the two officers present with Jay were health inspectors. In response, Jay informed Nilsen that the other two were also police officers, and requested access to his flat to discuss the matter further.
The three officers followed Nilsen into his flat, where they immediately noted the odour of rotting flesh. Nilsen questioned further as to why the police were interested in his drains, to which he was informed the blockage had been caused by human remains. Nilsen feigned shock and bewilderment, stating, "Good grief, how awful!" In response, Jay replied: "Don't mess about, where's the rest of the body?" Nilsen responded calmly, admitting that the remainder of the body could be found in two plastic bags in a nearby wardrobe, from which DCI Jay and his colleagues noted the overpowering smell of decomposition emanated. The officers did not open the cupboard, but asked Nilsen whether there were any other body parts to be found, to which Nilsen replied: "It's a long story; it goes back a long time. I'll tell you everything. I want to get it off my chest. Not here—at the police station." He was then arrested and cautioned on suspicion of murder, before being taken to Hornsey police station. As he was escorted to the police station, Nilsen was asked whether the remains in his flat belonged to one person or two. Staring out of the window of the police car, he replied, "Fifteen or sixteen, since 1978".
That evening, a Detective Superintendent Chambers accompanied DCI Jay and Professor Bowen to Cranley Gardens, where the plastic bags were removed from the wardrobe and taken to Hornsey mortuary. One bag was found to contain two dissected torsos, one of which had been vertically dissected, and a shopping bag containing various internal organs. The second bag contained a human skull almost completely devoid of flesh, a severed head, and a torso with arms attached but hands missing. Both heads were found to have been subjected to moist heat.
In an interview conducted on 10 February, Nilsen confessed there were further human remains stowed in a tea chest in his living room, with other remains inside an upturned drawer in his bathroom. The dismembered body parts were the bodies of three men, all of whom he had killed by strangulation—usually with a necktie. One victim he could not name; another he knew only as "John the Guardsman", and the third he identified as Stephen Sinclair. He also stated that, beginning in December 1978, he had killed "twelve or thirteen" men at his former address, 195 Melrose Avenue. Nilsen also admitted to having unsuccessfully attempted to kill approximately seven other people, who had either escaped or, on one occasion, had been at the brink of death but had been revived and allowed to leave his residence.
A further search for additional remains at 23 Cranley Gardens on 10 February revealed the lower section of a torso and two legs stowed in a bag in the bathroom, and a skull, a section of a torso, and various bones in the tea chest. The same day, Nilsen accompanied police to Melrose Avenue, where he indicated the three locations in the rear garden where he had burned the remains of his victims (investigators discovered over 1,000 fragments of bone from the garden at Melrose Avenue, many of them blackened and charred by fire).
Michael Cattran contacted the Daily Mirror on 10 February, informing the newspaper of the ongoing search for human remains at Cranley Gardens, leading the newspaper to break the story and spark intense national media interest. By 11 February, reporters from the Mirror had obtained photographs from Nilsen's mother in Aberdeenshire, which appeared on their front page the following day.[n 6]
Under English law, the police had 48 hours in which to charge Nilsen or release him. Assembling the remains of the victims killed at Cranley Gardens on the floor of Hornsey mortuary, Professor Bowen was able to confirm the fingerprints on one body matched those on police files of Sinclair. At 5:40 pm on 11 February, Nilsen was charged with Sinclair's murder, and a statement revealing this was released to the press. Formal questioning of Nilsen began the same evening, with Nilsen agreeing to be represented by a solicitor (a facility he had earlier declined). Police interviewed Nilsen on sixteen separate occasions over the following days, in interviews which totalled over 30 hours.
Nilsen was adamant he was uncertain as to why he had killed, simply saying, "I'm hoping you will tell me that" when asked his motive for the murders. He was adamant the decision to kill was not made until moments before the act of murder. Most victims had died by strangulation; on several occasions, he had drowned the victims once they had been strangled into unconsciousness. Once the victim had been killed, he typically bathed the victim's body, shaved any hair from the torso to conform it to his physical ideal, then applied makeup to any obvious blemishes upon the skin. The body was usually dressed in socks and underpants, before Nilsen draped the victims around him as he talked to the corpse. With most victims, Nilsen masturbated as he stood alongside or knelt above the body, and Nilsen confessed to having occasionally engaged in intercrural sex with his victims' bodies, but repeatedly stressed to investigators he had never actually penetrated his victims—explaining that his victims were "too perfect and beautiful for the pathetic ritual of commonplace sex".
All the victims' personal possessions were destroyed following the ritual of bathing their bodies in an effort to obliterate their identity prior to their murder and their now becoming what Nilsen described as a "prop" in his fantasies. In several instances, Nilsen talked to the victim's body as it remained seated in a chair or prone on his bed, and he recalled being emotional as he marvelled at the beauty of their bodies. With reference to one victim, Kenneth Ockenden, Nilsen noted that Ockenden's "body and skin were very beautiful", adding the sight "almost brought me to tears". Another, unidentified victim had been so emaciated that he had simply been discarded under the floorboards.
The bodies of the victims killed at his previous address were kept for as long as decomposition would allow: upon noting any major signs of decomposition, Nilsen stowed it beneath his floorboards. If a body did not display any signs of decomposition, he occasionally alternately stowed it beneath the floorboards and retrieved it before again masturbating as he stood over or lay alongside the body. Make-up was again applied to "enhance its appearance" and to obscure blemishes.
When questioned as to why the heads found at Cranley Gardens had been subjected to moist heat, Nilsen stated that he had frequently boiled the heads of his victims in a large cooking pot on his stove in order that the internal contents evaporated, thus removing the need to dispose of the brain and flesh. The torsos and limbs of the three victims killed at this address were dissected within a week or so of their murder before being wrapped in plastic bags and stowed in the three locations he had indicated to police; the internal organs and smaller bones he flushed down the toilet. This practice—which had led to his arrest—had been the only method he could consider to dispose of the internal organs and soft tissue as, unlike at Melrose Avenue, he had no exclusive use of the garden of the property.
At Melrose Avenue, Nilsen typically retained the victims' bodies for a much longer period before disposing of the remains. He kept "three or four" bodies stowed beneath the floorboards before he dissected the remains, which he would wrap inside plastic bags and either return under the floorboards or, in two instances, place inside suitcases which had been left at the property by a previous tenant. The remains stowed inside suitcases—those of Ockenden and Duffey—were placed inside a shed in the rear garden, and were disposed of upon the second bonfire Nilsen had constructed at Melrose Avenue. Other dissected remains—minus the internal organs—were returned beneath the floorboards or placed upon a bonfire he had constructed in the garden.
Nilsen confirmed that on four occasions, he had removed the accumulated bodies from beneath his floorboards and dissected the remains, and on three of these occasions, he had then disposed of the accumulated remains upon an assembled bonfire. On more than one occasion, he had removed the internal organs from the victims' bodies and placed them in bags, which he then typically dumped behind a fence to be eaten by wildlife. All the bodies of the victims killed at Melrose Avenue were dismembered after several weeks or months of internment beneath the floorboards. Nilsen recalled that the putrefaction of these victims' bodies made this task exceedingly vile; he recalled having to fortify his nerves with whisky and having to grab handfuls of salt with which to brush aside maggots from the remains. Often, he vomited as he dissected the bodies, before wrapping the dismembered limbs inside plastic bags and carrying the remains to the bonfires. Nonetheless, immediately prior to his dissecting the victims' bodies, Nilsen masturbated as he knelt or sat alongside the corpse. This, he stated, was his symbolic gesture of saying goodbye to his victims.
When questioned as to whether he had any remorse for his crimes, Nilsen replied: "I wished I could stop, but I couldn't. I had no other thrill or happiness". He also emphasised that he took no pleasure from the act of killing, but "worshipped the art and the act of death".
According to Nilsen, upon being transferred to Brixton Prison to await trial, his mood was one of "resignation and relief", with his belief being that he would be viewed, in accordance with law, as innocent until proven guilty. Nilsen objected to wearing a prison uniform while on remand. In protest at having to wear a prison uniform and what he interpreted to be breaches of prison rules, Nilsen threatened to protest against his remand conditions by refusing to wear any clothes; as a result of this threat, he was not allowed to leave his cell. On 1 August, Nilsen threw the contents of his chamber pot out of his cell, hitting several prison officers. This incident resulted in Nilsen being found guilty on 9 August of assaulting prison officers and subsequently spending 56 days in solitary confinement.
On 26 May, Nilsen was committed to stand trial at the Old Bailey on five counts of murder and two of attempted murder (a sixth murder charge was later added). Throughout this committal hearing, Nilsen was represented by a solicitor named Ronald Moss, whom he had previously dismissed as his legal representative on 21 April, before Moss was reappointed to the role after Nilsen had complained to magistrates he had been afforded no facilities with which he could mount his own defence. Moss was to remain Nilsen's legal representative until July 1983, when Nilsen—again expressing his intention to defend himself—discharged him, until 5 August when Nilsen once again reappointed Moss.
Initially, Nilsen had intended to plead guilty to each charge of murder at his upcoming trial. With Nilsen's full consent, Ronald Moss had fully prepared Nilsen's defence; five weeks before his trial, Nilsen again dismissed Moss, and opted instead to be represented by Ralph Haeems, upon whose advice Nilsen agreed to plead not guilty by diminished responsibility.
Nilsen was brought to trial on 24 October 1983, charged with six counts of murder and two of attempted murder. He was tried at the Old Bailey before Mr Justice Croom-Johnson and pleaded not guilty on all charges.
The primary dispute between the prosecuting and defence counsel was not whether Nilsen had killed the victims, but his state of mind before and during the killings. The prosecuting counsel, Allan Green QC, argued that Nilsen was sane, in full control of his actions, and had killed with premeditation. The defence counsel, Ivan Lawrence QC, argued that Nilsen suffered from diminished responsibility, rendering him incapable of forming the intention to commit murder, and should therefore be convicted only of manslaughter.
The prosecution counsel opened the case for the Crown by describing the events of February 1983 leading to the identification of human remains in the drains at Cranley Gardens and Nilsen's subsequent arrest, the discovery of three dismembered bodies in Nilsen's property, his detailed confession, his leading investigators to the charred bone fragments of 12 further victims killed at Melrose Avenue, and the efforts he had taken to conceal his crimes. In a tactful reference to the primary dispute between opposing counsel at the trial, Green closed his opening speech with an answer Nilsen had given to police in response to a question as to whether he needed to kill: "At the precise moment of the act [of murder], I believe I am right in doing the act". To counteract this argument, Green added: "The Crown says that even if there was mental abnormality, that was not sufficient to diminish substantially his responsibility for these killings".
The first witness to testify for the prosecution was Douglas Stewart, who testified that in November 1980, he had fallen asleep in a chair in Nilsen's flat only to wake to find his ankles bound to a chair and Nilsen strangling him with a tie as he pressed his knee to his (Stewart's) chest. Successfully overpowering Nilsen, Stewart testified that Nilsen had then shouted, "Take my money!" This, the prosecution attested, reflected Nilsen's rational, cool presence of mind in that he hoped to be overheard by other tenants. Upon leaving Nilsen's residence, Stewart had reported the attack to police, who in turn questioned Nilsen. Noting conflicting details in accounts given by both men, police had dismissed the incident as a lovers' quarrel. Upon cross-examination, the defence counsel sought to undermine Stewart's credibility, pointing to minor inconsistencies in the testimony, the fact he had consumed much alcohol on the night in question, and suggesting his memory had been selectively magnified as he had previously sold his story to the press.
On 25 October the court heard testimony from two further men who had survived attempts by Nilsen to strangle them. The first of these, Paul Nobbs, provided testimony which the prosecution asserted was evidence of Nilsen's self-control and ability to refrain from homicidal impulses. A university student, Nobbs testified that he accompanied Nilsen to Cranley Gardens for alcohol and sex and woke in the early hours of the morning with "a terrible headache". Upon washing his face in Nilsen's bathroom, as Nobbs noted his eyes were bloodshot and his face completely red, Nilsen had exclaimed, "God! You look bloody awful!" Nilsen then advised the youth to see a doctor. Nobbs had not reported the attack to police for fear of his sexuality being discovered. Contrary to the prosecution claims, the defence counsel asserted that Nobbs' testimony reflected Nilsen's rational self being unable to control his impulses. The fact Nilsen had selected a university student as a potential victim was at odds with the prosecution's claim that Nilsen intentionally selected rootless males whose disappearance was unlikely to be noted.
Immediately after the testimony of Nobbs had concluded, Carl Stottor took the stand to recount how, in May 1982, Nilsen had attempted to strangle and drown him, before bringing him "back to life". Stottor's voice frequently quavered with emotion as he recounted how Nilsen had repeatedly attempted to drown him in his bathtub as he pleaded in vain for his life to be spared, and how he later awoke to find Nilsen's mongrel dog licking his face; on several occasions, the judge had to allow Stottor time to regain his composure. (The evidence provided by Stottor was not included as part of the indictment against Nilsen as his whereabouts were not known until after the indictment had been completed.)
Written statement made by Nilsen to DCI Peter Jay, February 1983.
DCI Jay then recounted the circumstances of Nilsen's arrest and his "calm, matter-of-fact" confessions, before reading to the court several statements volunteered by Nilsen following his arrest. In one of these statements, Nilsen had said: "I have no tears for my victims; I have no tears for myself, nor those bereaved by my actions". Jay admitted it was unusual for anyone accused of such horrific crimes to be so forthcoming in providing information, and conceded upon questioning by defence counsel that Nilsen not only provided most of the evidence against himself, but also encouraged the discovery of evidence which could contradict his own version of events. Following Jay's testimony, DS Chambers recited Nilsen's formal confession to the court. This testimony included graphic descriptions of the ritualistic and sexual acts Nilsen performed with his victims' bodies, his various methods of storage of bodies and body parts, dismemberment and disposal, and the problems decomposition—particularly regarding colonies of maggots—afforded him. Several jurors were visibly shaken throughout this testimony; others looked at Nilsen with incredulous expressions on their faces as Nilsen listened to the testimony with apparent indifference. This testimony lasted until the following morning, when the prosecution included several exhibits into evidence. This included the cooking pot in which Nilsen had boiled the heads of the three victims killed at Cranley Gardens, the cutting board he had used to dissect John Howlett, and several rusted catering knives which had formerly belonged to victim Martyn Duffey.
Two psychiatrists testified on behalf of the defence. The first of these, James MacKeith, began his testimony on 26 October. MacKeith testified as to how, through a lack of emotional development, Nilsen experienced difficulty expressing any emotion other than anger, and his tendency to treat other human beings as components of his fantasies. The psychiatrist also described Nilsen's association between unconscious bodies and sexual arousal; stating that Nilsen possessed narcissistic traits, an impaired sense of identity, and was able to depersonalise other people. He stated his conclusions that Nilsen displayed many signs of maladaptive behaviour, the combination of which, in one man, was lethal. These factors could be attributed to an unspecified personality disorder from which MacKeith believed Nilsen suffered. In response to prosecution contention that, in attributing an unspecified disorder to Nilsen, MacKeith was undecided in his conclusions, MacKeith contended that this unspecified personality disorder was severe enough to substantially reduce Nilsen's responsibility.
The second psychiatrist to testify for the defence, Patrick Gallwey, diagnosed Nilsen with a "borderline, false-self as if pseudo-normal, narcissistic personality disorder", with occasional outbreaks of schizoid disturbances that Nilsen managed most of the time to keep at bay; Gallwey stated that, in episodic breakdowns, Nilsen became predominantly schizoid—acting in an impulsive, violent and sudden manner. Gallwey further added that someone suffering from these episodic breakdowns is most likely to disintegrate under circumstances of social isolation. In effect, Nilsen was not guilty of "malice aforethought". Upon cross-examination, Green largely focused upon the degree of awareness shown by Nilsen and his ability to make decisions. Gallwey conceded that Nilsen was intellectually aware of his actions, but stressed that, due to his personality disorder, Nilsen did not appreciate the criminal nature of what he had done.
On 31 October, the prosecution called Paul Bowden to testify in rebuttal of the psychiatrists who had testified for the defence. Prior to Nilsen's trial, Bowden had interviewed the defendant on sixteen separate occasions in interviews totalling over fourteen hours. Over two days, Bowden testified that, although he found Nilsen to be abnormal in a colloquial sense, he had concluded Nilsen to be a manipulative person who had been capable of forming relationships, but had forced himself to objectify people. Refuting the testimony of MacKeith and Gallwey, Bowden further testified he had found no evidence of maladaptive behaviour, and that Nilsen suffered from no disorder of the mind.
Following the closing arguments of both prosecution and defence, the jury retired to consider their verdict on 3 November 1983. The following day, the jury returned with a majority verdict of guilty upon six counts of murder and one of attempted murder, with a unanimous verdict of guilty in relation to the attempted murder of Nobbs. Croom-Johnson sentenced Nilsen to life imprisonment with a recommendation that he serve a minimum of 25 years' imprisonment.
Following his conviction, Nilsen was transferred to Wormwood Scrubs prison to begin his sentence. As a Category A prisoner, Nilsen was assigned his own cell, and could mix freely with other inmates. Nilsen did not lodge an appeal, accepting that the Crown case—that he had had the capacity to control his actions and that he had killed with premeditation—was essentially correct. He further elaborated on the day of his conviction that he took an enormous thrill from the "social seduction; the getting the 'friend' back; the decision to kill; the body and its disposal". Nilsen also claimed drunkenness was the sole reason at least two of his attempted murders were unsuccessful.[n 7]
In December 1983, Nilsen was cut on the face and chest with a razor blade by an inmate named Albert Moffatt, resulting in injuries requiring 89 stitches. Afterward, he was briefly transferred to Parkhurst prison, before being transferred to Wakefield prison, where he remained until 1990. In 1991, he was transferred to a vulnerable-prisoner unit at Full Sutton prison upon concerns for his safety. He remained there until 1993, when he was transferred to Whitemoor prison, again as a Category A prisoner, and with increased segregation from other inmates.
The minimum term of 25 years imprisonment to which Nilsen was sentenced in 1983 was replaced by a whole-life tariff by Home Secretary Michael Howard in December 1994. This ruling ensured he would never be released from prison, a punishment he accepted.
In 2003, Nilsen was again transferred to HMP Full Sutton, where he remained incarcerated as a Category A prisoner. In the prison workshop, Nilsen translated books into braille. He spent much of his free time reading and writing, and was allowed to paint and compose music upon a keyboard. He also exchanged letters with numerous people who sought his correspondence. Nilsen remained at HMP Full Sutton until his death on 12 May 2018.
In September 1992, Central Television conducted an interview with Nilsen as part of the programme Viewpoint 1993 – Murder In Mind, which focused upon offender profiling. A four-minute section of this interview, in which Nilsen frankly discussed his crimes, was initially scheduled to be broadcast on 19 January 1993; the Home Office sought to ban the interview from being broadcast on the grounds that they had not granted permission for Central Television to conduct interviews with Nilsen which were later broadcast to the public, and claimed ownership of copyrighted material. Central Television challenged the Home Office ruling in court, citing sections of the Copyright, Designs and Patents Act 1988, and that full permission to conduct an interview with Nilsen had been granted in advance. On 26 January 1993 Judge William Aldous ruled in Central's favour, and the same day, three appeal court judges, Sir Thomas Bingham, Master of the Rolls, Lord Justice McCowan and Lord Justice Hirst, upheld his decision. The interview was screened in full that evening.
Nilsen repeatedly sought legal avenues to challenge real and perceived abuses of prison rules by prison officers—regularly petitioning the Home Office and, later, the European Court of Human Rights with complaints. As a result, he was an unpopular inmate with successive governors at the various prisons in which he was incarcerated. In October 2001, he brought a judicial review against the prison service, citing that the homosexual softcore pornography magazines Vulcan and Him, to which he subscribed regularly, had some images and articles of a more explicit nature removed before the magazine reached him. The legal case he brought against the prison service was dismissed because he could not establish that any breach of his human rights had occurred.
In the years following his incarceration, Nilsen composed an unpublished, 400-page autobiography, entitled The History of a Drowning Boy (the title being a reference to his concepts of the tranquillity of death following his grandfather's death and his own near-fatal drowning in 1954). A copy of the autobiography remains in the possession of one of the people with whom Nilsen corresponded and in whom Nilsen held unquestioning trust. In his autobiography, Nilsen stated that, beginning with his service in the army, he constantly lived two separate lives: his "real life" and his "fantasy life". He writes: "When I was with people, I was in the "real" world, and in my private life, I snapped instantly into my fantasy life. I could oscillate between the two with instant ease." With reference to his murders, Nilsen claimed that his emotional state upon the dates of the murders, in conjunction with the amount of alcohol he had consumed, were both core factors in his decision to kill. He further emphasised that, when feeling low, seizing an opportunity to satisfy the sexual fantasies he had developed in which the victim is the young, attractive and passive partner, and he the older active partner, temporarily relieved him of a general feeling of inadequacy.
Nilsen's first murder victim was identified in 2006 as 14-year-old Stephen Dean Holmes. Formal identification was confirmed via a combination of circumstantial evidence and by Nilsen identifying a photograph of the youth shown to him by police (all bone fragments found at Melrose Avenue had been destroyed). He was not charged with this murder as the Crown Prosecution Service decided that a prosecution would not be in the public interest, and would not contribute to his current sentence.
At least four victims killed between 1980 and 1981 at Melrose Avenue remain unidentified. A forensics expert testified at Nilsen's 1983 trial that "at least eight bodies" had been incinerated at Melrose Avenue, academically confirming he had murdered at least eleven victims. Several items confiscated from Nilsen's Cranley Gardens address—some of which had been introduced as evidence at Nilsen's trial—are on display at New Scotland Yard's Crime Museum. These exhibits include the stove upon which Nilsen had boiled the heads of his final three victims; the knives he had used to dissect several of his victims' bodies; the headphones Nilsen had used to strangle Ockenden; the ligature he had fashioned to strangle his last victim; and the bath from his Cranley Gardens address in which he had drowned Howlett and retained the body of Allen prior to dissection.
On 10 May 2018, Nilsen was taken from Full Sutton prison to York Hospital after complaining of severe stomach pains. He was found to have a ruptured abdominal aortic aneurysm which was repaired, although he subsequently suffered a blood clot as a complication of the surgery. Nilsen died on 12 May. A subsequent post-mortem examination revealed that the immediate cause of Nilsen's death was pulmonary embolism and retroperitoneal haemorrhage.
Nilsen is known to have killed twelve young men and boys between 1978 and 1983; it is suspected that the true number of victims may be fifteen. At least nine victims had been killed at 195 Melrose Avenue, with his final three victims being killed at 23 Cranley Gardens. Of Nilsen's eight identified victims, only three—Stephen Holmes, Kenneth Ockenden and Graham Allen—had a permanent address at the time of their murder, with the remaining victims largely (though not exclusively) consisting of vagrants, runaways and male prostitutes.
In 1992, Nilsen claimed the true total of victims he killed was twelve, and that he had fabricated the three additional victims he initially confessed to having killed at Melrose Avenue, both in response to pressure as he was being interviewed as well as to simply "stick with the figure" of approximately fifteen victims he had provided investigators with as he was initially escorted to Hornsey police station. Nilsen said that three unidentified victims he had initially confessed to killing—an Irishman in September 1980; a "hippy" in November or December 1980, and a skinhead in April 1981—had been invented to simply "complement the continuity of evidence". DCI Jay dismisses Nilsen's claims to have only killed twelve victims, stating that in the more than 30 hours of interviews police had conducted with Nilsen, when discussing the fifteen victims he had initially confessed to killing, he had never provided any inconsistencies in the physical characteristics, the date or place of encounter, the act of murder, or the ritual he observed with the body of any of the fifteen victims.
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