On August 10, 1977, the NYPD arrested David Berkowitz, a mailman from Yonkers, for the Son of Sam murders that had terrorized New York City for over a year. Berkowitz confessed to shooting sixteen people and killing six with a 44 caliber Bulldog revolver, and the case was officially closed. Journalist Maury Terry was suspicious of Berkowitz's confession. Spurred by conflicting witness descriptions Berkowitz didn't act alone. Meticulously gathering evidence for a decade, he released his findings in the first edition of The Ultimate Evile. Based upon the evidence he had uncovered, Terry theorized that the Son of Sam attacks were masterminded by a Yonkers-based cult that was also responsible for other ritual murders across the country. After Terry's death in 2015, documentary filmmaker Joshua Zeman (Cropsey, The Killing Season, Murder Mountain) was given access to Terry's case files, which form the basis of his docuseries with Netflix and a companion podcast. Taken together with The Ultimate Evil, which includes a new introduction by Zeman, these works reveal the stunning intersections ofpower, wealth, privilege, and evil in America-from the Summer of Sam until today.