The serial killer’s voice in previously unreleased 1980 recordings provides the hook to director Joe Berlinger’s documentary, which also offers interviews with detectives, survivors and others connected to or obsessed with the case.

Police officers escort American accused (and ultimately convicted) serial killer David Berkowitz (left), known as the Son of Sam, into the 84th precinct station, New York, N.Y. Aug. 10, 1977. Credit - Robert R. McElroy—Getty Images

Netflix fans have been left gripped by the new true crime series Conversations with a Killer: The Son of Sam Tapes, which tells the harrowing story of serial killer David Berkowitz