The Sons of Sam: A Descent into Darkness: journalist Maury Terry, the author of The Ultimate Evil: An Investigation into America's Most Dangerous Satanic Cult, and David Berkowitz, referred to by some as the .44 Caliber Killer, and more widely known as the Son of Sam, a name he gave himself. Berkowitz was an unassuming man, by all accounts. He had served time in the US army, after which he turned his hand to a number of jobs, including a security guard, taxi driver and a letter sorter for the postal service. In archive footage used in the Netflix docuseries, he's described by a former colleague and those in the local community as quiet and pleasant, if perhaps a little strange.