Dennis Nilsen was born November 23, 1945 in Fraserburgh, Scotland. Though Nilsen recognized his homosexual desires, he was never comfortable with them and began acting on them through murder and dismemberment. Nilsen's first victim was in 1978, he went on to kill, upon his confession, twelve young men and dissect their bodies. Dennis Nilsen killed, defiled and dismembered 15 young men between December 1978 and February 1983, practically under the noses of his neighbors. When police finally arrested him in 1983, it quickly became apparent that, had they linked a series of reported incidents from lucky escapees over the previous five years, they might well have halted his ghoulish killing spree considerably sooner. His parents' marriage was an unhappy one and, as a result he lived (along with his mother and siblings) with his maternal grandfather, whom Nilsen adored. Nilsen claimed that his beloved grandfather's unexpected death, when he was just six years old, and the traumatizing viewing of his corpse at the funeral, led to his later behavioral psychopathology. His mother went on to remarry and have four more children, leaving Nilsen a withdrawn and lonely child. Aware of his homosexual attractions, he claimed no sexual encounters as an adolescent, and at 16 he enlisted in the army. He became a cook, serving as a butcher in the Army Catering Corps, learning the skills that served him so well during his five-year killing spree.
Upon leaving the army in 1972 he took up police training, where he discovered a fascination with morgue visits and autopsied bodies. Despite the obvious advantages that police work gave to develop his morbid tastes, he resigned and went on to become a recruitment interviewer. Nilsen's first official brush with the police came in 1973. David Painter, a young man whom Nilsen had met through his work, claimed that Nilsen had taken pictures of him while he was asleep. Painter was so incensed that he required hospitalization as a result of their confrontation. Nilsen was brought in for questioning about the incident, but was subsequently released without charge. In 1975, he took up cohabitation with David Gallichan in a garden apartment situated at 195 Melrose Avenue, in North London, although Gallichan denied that they had a homosexual relationship This lasted two years and, when Gallichan left, Nilsen's life began a downward spiral into alcohol and loneliness, that culminated in the first murder 18 months later.
Nilsen became increasingly disturbed by his sexual encounters, which only seemed to reinforce his loneliness when they were over. He met his first young victim in a pub on December 29, 1978, and invited him home, as he had on previous occasions. The next morning, overcome by a desire to prevent the man from leaving, he first strangled him with a tie, before drowning him in a bucket of water. Taking the corpse to his bathroom to wash it, he then placed it back in his bed, later remarking that he found the corpse beautiful. He attempted to have sex, unsuccessfully, then spent the night sleeping next to the dead man. He finally hid the corpse under his floorboards for seven months, before removing it and burning the decaying remains in his back garden. His second brush with the police came in October 1979, when a young student accused Nilsen of trying to strangle him during a bondage-play session. Despite the student's claims, no charges were pressed against Nilsen.
He encountered his second victim, Canadian tourist Kenneth Ockendon, at a pub on December 3, 1979. Following a day of sightseeing and drinking, which ended at Nilsen's apartment, Nilsen again succumbed to his fears of abandonment and strangled Ockenden to death with an electrical cable, before cleaning up the corpse as before, and sharing a bed overnight. He took photos, engaged in sex and finally deposited the corpse under the floorboards, removing it frequently and engaging in conversation, as if Ockenden were still alive. His third victim, some five months later, was Martyn Duffey, a homeless sixteen year old, who was invited to spend the night on May 13, 1980. As with his first victim, Nilsen strangled then drowned him, before bringing him back to bed and masturbating over the teenager's corpse. Duffey was kept in a wardrobe for two weeks, before joining Ockenden under the floorboards.
His next victim was prostitute Billy Sutherland, 27, who had the misfortune of following Nilsen home one night. He too was strangled. Malcolm Barlow, 24, was an orphan with learning disabilities, who was soon dispatched by strangulation. By 1981, Nilsen had killed 12 men in the apartment, of whom only the above four could be identified. Given his penchant for preying on the homeless and the unemployed in a large city, this is probably less surprising than it might be in a smaller community.
Nilsen claimed he went into a killing trance and on seven occasions, actually freed the men rather than complete the act, because he was able to snap out of it. The majority of his victims were not so lucky. By the time Malcolm Barlow was killed, Nilsen was forced to stuff him under the kitchen sink, as he was rapidly running out of storage space, what with half a dozen bodies hidden around the apartment. He was forced to spray his rooms twice a day, to be rid of the flies that were hatched from the decomposing bodies. When neighbors complained about the smell, he convinced them they stemmed from structural problems with the building. To get rid of the corpses, he would remove his clothing and dismember them on the stone kitchen floor with a large kitchen knife, sometimes also boiling the skulls to remove the flesh, also placing organs and viscera in plastic bags for disposal. He buried limbs in the garden and in the shed, and stuffed torsos into suitcases until he could burn the remains in a bonfire at the end of his garden. On occasions he would burn fires all day, without raising any suspicion from neighbors. He generally crushed the bones once the fire had consumed the flesh, and police found thousands of bone fragments in the garden during later forensic examinations.
In 1982, in a desperate attempt to stifle his homicidal behavior, Nilsen moved into a top-floor apartment at 23 Cranley Gardens, Muswell Hill, also in North London, which had no garden and no convenient floorboards. Still unable to quell his impulses, a further three victims were killed in this apartment between his arrival and February 1983. These victims were identified as John Howlett, Archibald Graham Allan and Steven Sinclair, and presented Nilsen with much greater disposal challenges, given the apartment's lack of direct access outdoor space. He overcame these obstacles by boiling the heads, feet and hands, and dissecting the bodies into small pieces that could be flushed down the toilet, and disposed of in plastic bags. There were five other tenants at Cranley Gardens, none of whom knew Nilsen very well and, in early February 1983, one of them called out drain specialists Dyno-Rod to investigate a drain blockage. In the presence of the tenants, including Nilsen, the technician discovered rotting human remains when he descended via the outdoor manhole, and it was decided that a full inspection would be conducted the next day, after which the police would be called in to investigate. Nilsen, increasingly aware of the prospect of capture, tried to cover his tracks by removing the human tissue from the drains that night, but was spotted by the downstairs tenant, who became suspicious of his actions. It was reported that, on the morning of February 9, 1983, he told a work colleague laughingly, "If I'm not in tomorrow, I'll either be ill, dead or in jail."
Nilsen was met on the evening of February 9 by Detective Chief Inspector Jay, who informed him that they wished to question him in relation to the human remains that had been discovered in the drains. On entering the apartment, Jay noticed the pervasive foul odor, and asked Nilsen what it was, at which point he calmly confessed that what they were looking for was stored in bags around the apartment, which included two dismembered heads and other larger body parts.
