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

Meanwhile, we keep going back to the interview with a very honest and disarming Berkowitz as he details to Jones how finding out he was adopted when he was a kid set his world spinning. He acted out all the time,