Nine Zodiac Killer Suspects And The Disturbing Stories Behind Them

Published December 13, 2022
Updated October 23, 2024

Who Is The Zodiac Killer? The Chilling Case Against Jack Tarrance

Was Jack Tarrance The Zodiac Killer

YouTubeJack Tarrance was accused by his stepson, Dennis Kaufman.

Like Gary Stewart, Dennis Kaufman claimed that the Zodiac Killer had been a member of his family. In 2007, he alleged that his recently deceased stepfather, Jack Tarrance, had been the infamous murderer.

Kaufman offered the FBI several pieces of evidence, including a hood that his stepfather had owned with the Zodiac’s symbol on it, writing samples, a bloody knife, and a roll of film. In addition, he claimed that his stepfather had killed Kaufman’s mother.

Plus, Kaufman claimed that he had even spoken about the Zodiac Killer’s identity to Tarrance, who never denied that he could be the murderer.

Zodiac Killer Robe

San Francisco Police DepartmentThe Zodiac Killer allegedly wore this symbol during the Lake Berryessa attacks.

“If I wrote a book and said ‘I think my stepdad is the Zodiac Killer,’ they wouldn’t f—ing believe me anyway,” Kaufman allegedly told his stepfather, as reported by KQED. Kaufman says that in response, Tarrance just laughed and then quipped, “Why would you put that ‘I think’ on there?”

Tarrance had also served in the Air Force and the Navy and knew about cryptograms. And a handwriting expert seemed to believe that Tarrance’s handwriting bore a strong resemblance to the Zodiac Killer’s.

But Tarrance has largely been dismissed by law enforcement. The evidence that Kaufman gave the FBI was apparently not very compelling, and some investigators have questioned the credentials of the handwriting expert who examined Tarrance’s penmanship.

author
Kaleena Fraga
author
A senior staff writer for All That's Interesting since 2021 and co-host of the History Uncovered Podcast, Kaleena Fraga graduated with a dual degree in American History and French Language and Literature from Oberlin College. She previously ran the presidential history blog History First, and has had work published in The Washington Post, Gastro Obscura, and elsewhere. She has published more than 1,200 pieces on topics including history and archaeology. She is based in Brooklyn, New York.
editor
Jaclyn Anglis
editor
Based in Brooklyn, New York, Jaclyn Anglis is the senior managing editor at All That's Interesting, where she has worked since 2019. She holds a Master's degree in journalism from the City University of New York and a dual Bachelor's degree in English writing and history from DePauw University. In a career that spans 11 years, she has also worked with the New York Daily News, Bustle, and Bauer Xcel Media. Her interests include American history, true crime, modern history, and science.
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Fraga, Kaleena. "Nine Zodiac Killer Suspects And The Disturbing Stories Behind Them." AllThatsInteresting.com, December 13, 2022, https://allthatsinteresting.com/who-was-the-zodiac-killer. Accessed August 2, 2025.