The document summarizes the crimes and background of David Berkowitz, known as the "Son of Sam" serial killer who terrorized New York City in the 1970s. It describes his troubled childhood, military service, the murders he committed using a .44 caliber handgun where he left bizarre letters to police, and his claims that he was part of a cult that helped him and committed other murders. It also provides details on two of his victims, Donna Lauria and Jody Valenti, who were shot by Berkowitz in July 1976.