On August 10, 1977, the NYPD arrested David Berkowitz 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 of the killer and clues overlooked in the investigation, Terry was convinced Berkowitz didn’t act alone. Meticulously gathering evidence for a decade, he released his findings in the first edition of The Ultimate Evil. Based upon the evidence he had uncovered, Terry theorized that the Son of Sam attacks were masterminded by a Yonkers-based cult that was responsible for other ritual murders across the country.