Product: The Hunt for Zodiac: The Inconceivable Double Life of a Notorious Serial Killer
From December 1968 until July 1974, a man who called himself the Zodiac terrorized the people of 
the San Francisco Bay Area with cold-blooded murders and chilling hand printed letters to the editors of 
the local newspapers. In these letters, he boasted of his crimes, threatened unspeakable mayhem, he 
taunted and ridiculed his police pursuers, and even hinted that he was leaving clues to his true identity. 
The Zodiac killer has been called a “sexual sadist,” a “sexual killer without the sex” and a “loser 
who was compensating for his feelings of inadequacy” after killing five people and then writing about his 
exploits under his now infamous pen name. None of that is the truth and when you learn the truth 
about his identity, it will surely shock you as much as it did me. 
 
In June 1999, I had what I thought to be a simple-minded idea to use the killer’s letter writing 
behavior as a weapon to identify him. That idea led to just one name. The first step in identifying the 
Zodiac killer will be to redefine him through behavioral profiling that was not available to the police in 
the 1960s. That profile will be based on the killer’s crime scenes and on how he interacted with his 
victims. As a result of an inaccurate profile of the Zodiac killer, for many years people both inside and 
outside of law enforcement have been looking for the killer in all the wrong places. 
 
This book is the product of over 18 years of diligent research. I have worked very hard to remain 
objective and honest when interpreting the vast amount of information I amassed from my research, the 
case knowledge I gained, and the evidence and findings that led me to my suspect and ultimately 
revealed his behavior and the double life he led. My goal in this book is to put the truth as I see it about 
the identity of the Zodiac Killer before the public…that truth may not be what people expected in their 
wildest dreams, nor what anyone who knew my suspect could have imagined in their worst nightmares.

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