Berkowitz, who is now 72, is currently incarcerated at the Shawangunk Correctional Facility in Ulster County, New York. He was found guilty of six counts of second degree murder and seven counts of attempted second degree murder in 1978 and sentenced to 25-years-to-life in prison for each murder.

Joe Berlinger explores what made David Berkowitz different from other serial killers in new true crime docuseries, comparing him to modern school shooters rather than sadistic killers.

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.