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'Son of Sam' was the self-proclaimed nickname of serial killer David Berkowitz, who is currently serving six consecutive life sentences after killing several people in a 1976 shooting spree in New York City.
After eluding the biggest manhunt in the history of New York City, Berkowitz was eventually taken into custody by police in August 1977, and has been incarcerated ever since his arrest.
It wasn't until the mid-1990s that he claimed he had been a member of a Satanic cult, which had been behind the numerous killings.
In The Sons of Sam: A Descent Into Darkness, filmmaker Joshua Zeman explores whether or not Berkowitz acted alone in orchestrating the murder spree, as journalist and author Maury Terry claims there is a deeper 'web of darkness' behind his crimes.
A synopsis reads: "The hunt for the Son of Sam' captivated the world in the late 1970s, but the story behind one of America's most notorious serial murderers is all but forgotten - until now.
"While the arrest and conviction of David Berkowitz brought the nightmare to an end for many New Yorkers, for journalist and Ultimate Evil author Maury Terry, the real mystery was just beginning.
"Terry, convinced Berkowitz had not acted alone, would go on to spend decades attempting to prove that the web of darkness behind the murders went deeper than anyone imagined.
"His pursuit of that elusive truth would eventually cost him everything.
"Filmmaker Joshua Zeman (Cropsey, Murder Mountain) draws on archival news footage, conversations with the people closest to the investigation, and Terry's own words and case files to tell a cautionary tale of a man who went down a rabbit hole and never came out.
"But was Maury Terry just chasing ghosts - or are the true Sons of Sam still out there...?"
Fans of psychological crime thriller Mindhunter will also recognise Berkowitz's name from season two, where actor Oliver Cooper gave a chilling portrayal of the killer.
The Sons of Sam: A Descent Into Darkness will be available to watch on Netflix from 5 May.
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