is a New York Times bestselling true-crime memoir by Gary L. Stewart and Susan Mustafa that presents a theory identifying the infamous Zodiac Killer . Published in 2014, the book chronicles Stewart's decade-long search for his biological father, which ultimately led him to believe his father was the elusive serial murderer. Core Premise and Theory

Van Best Jr. was a convicted pedophile with a history of predatory behavior, providing a psychological profile that Stewart argued fit the killer. The FX Docuseries and Debunking

Stewart noted a striking similarity between his father's mugshot and the 1969 police sketch of the Zodiac.

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The Most Dangerous Animal Of All May 2026

is a New York Times bestselling true-crime memoir by Gary L. Stewart and Susan Mustafa that presents a theory identifying the infamous Zodiac Killer . Published in 2014, the book chronicles Stewart's decade-long search for his biological father, which ultimately led him to believe his father was the elusive serial murderer. Core Premise and Theory

Van Best Jr. was a convicted pedophile with a history of predatory behavior, providing a psychological profile that Stewart argued fit the killer. The FX Docuseries and Debunking The Most Dangerous Animal of All

Stewart noted a striking similarity between his father's mugshot and the 1969 police sketch of the Zodiac. is a New York Times bestselling true-crime memoir by Gary L