Dennis Andrew Nilsen (born 23 November 1945) is a serial killer and necrophiliac, also known as the Muswell Hill Murderer and the Kindly Killer, who committed the murders of 15 young men in London, England, between 1978 and 1983. He retained his victims' bodies for extended periods of time before dissecting their remains and disposing of them via burning or flushing the remains down a lavatory.