Stewart noted a striking similarity between his father's mugshot and the 1969 police sketch of the Zodiac.
A handwriting expert initially suggested that Van Best Jr.'s writing on a marriage certificate matched the Zodiac's cryptic letters. The Most Dangerous Animal of All
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 Stewart noted a striking similarity between his father's