A chilling new documentary will delve into the mind of one of the UK's most notorious killers. Watch the trailer below:
Memories of a Murderer: The Nilsen Tapes lands on Netflix this week and includes never before heard recordings of the man who brutally murdered 12 young men and boys in the 1970s and 80s.
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Directed by Michael Harte (Don't F***k With Cats), the 90-minute film offers a deeper insight into the inner workings of Nilsen's mind, from growing up in a quiet Scottish village to bringing death and destruction to the streets of London.
The official synopsis reads: "Over a five-year period, he picked up vulnerable young men, lured them back to his home and strangled them, before disposing of their bodies under the floorboards.
"The truth about how and why he killed has been the subject of much speculation in books and documentaries over the decades since.
"Now, with unique access to a wealth of personal archive left in his cell after his death, including over 250 hours of never-before-published cassette tapes of his private recordings, this film will take us into Nilsen's world.
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"From a young boy growing up in a quiet Scottish fishing village to a cold-blooded murderer prowling the streets of London."
It goes on: "Set against the backdrop of 1980s Britain, when mass unemployment drew young men to London in search of their fortunes, only to find themselves destitute and easy prey, and weaving together interviews from police, journalists, survivors, bereaved families, and - for the first time - the killer's own voice, this feature-length documentary explores how Nilsen was able to get away with multiple murders and attacks, unchallenged, for five years."
Nilsen died on 12 May 2018 aged 72 and was a serial killer and necrophile who is believed to have brutally murdered at least 12 young men and boys between 1978 and 1983.
When he was arrested, however, he had claimed to have butchered as many as 16.
Last year, David Tennant played him in the gripping ITV mini-series Des.
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Speaking ahead of its release, he said he felt it was 'right and proper' that Nilsen didn't live long enough to see the series.
He said: "After he was arrested, Dennis Nilsen became obsessed with was the legend of 'Des' - the reputation that he left behind.
"Whenever he slipped out of public consciousness, there was almost a sense that he wanted to get back into it. That's why I'm relieved he's not alive.
"I would hate for this to go out and for him to be sitting in some cell somewhere imaging we were in any way glorifying him. I'm sure he would have complained about what we said and everything we did. At the same time, he would have been rather smugly pleased he was on television.
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"I think it's right and proper it's transmitting after he's gone."
Memories of a Murderer: The Dennis Nilsen Tapes will be available to watch from 18 August.
Topics: Police, David Tennant, UK News, True Crime, crime, UK Entertainment, Documentary, Netflix, Murder, London