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The unsettling trailer opens with an audio clip from a "wealth of personal archives" consisting of Nilsen's tapes that were left in his cell after his death in May 2018.
Dennis Nilsen confessed to killing 15 people in 1983. The gruesome murders took place over a five-year period, in which he picked up vulnerable young men, lured them back to his home and strangled them, before disposing of their bodies under the floorboards of his north London flat.
The archive that Netflix gained access for the documentary includes over 250 hours of never-before-published cassette tapes of Nilsen's private recordings.
Viewers will hear Nilsen speak about his life and his crimes as well as anecdotes from the from the police, journalists, survivors and bereaved families to explore how Nilsen was able to get away with multiple murders and attacks, unchallenged, for five years.
The film will take viewers into Nilsen's mind and will examine how he went from a boy growing up in a quiet fishing village in Scotland to a notorious cold-blooded murderer prowling the streets of London.
Directed Michael Harte and executive produced by Dimitri Doganis and Sam Starbuck, the film is set against the backdrop of Britain in the 1980s, a time when mass unemployment enticed lots of young men to London in search of better opportunities only to find themselves penniless and vulnerable.
The Netflix documentary follows ITV's gripping drama Des starring David Tennant as the Scottish serial killer. The series aired over three consecutive nights in September last year.
Based on Brian Masters' biography of Nilsen, the clever drama tells the story through the prism of three men: Nilsen himself as well as other key characters, Detective Chief Inspector Peter Jay and biographer Brian Masters.
Memories of a Murderer: The Nilsen Tapes launches on Netflix August 18th 2021.
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