Despite the passage of fifty years since his last activity, the case of the Zodiac Killer continues to fascinate and frustrate law enforcement, the media, and the American public, making America’s most notorious unsolved murder case.

Thank you to the Incredible Dave White of Bring Me the Axe Podcast for research and Writing support!

References

Belcher, Jerry. 1969. "Police certain Zodiac called." San Francisco Examiner, October 23: 1.

Bernhard, Hubert J. 1969. "Killer of cabbie is linked to 4 murders." San Francisco Examiner, October 15: 3.

Bernhard, Hurbert J. 1969. "TV 'Zodiac' reneges on surrender." San Francisco Examiner, October 22: 1.

Blankenstein , Andrew, and Wilson Wong. 2021. 'The case remains open': FBI rebuts claim Zodiac Killer case is solved. October 7. Accessed February 2025. https://www.nbcnews.com/news/us-news/case-remains-open-fbi-refutes-claim-zodiac-killer-case-solved-n1281002.

Chabria, Anita. 2018. "Vallejo police have sent Zodiac Killer DNA to a lab. Results could come in weeks." Sacramento Bee, May 3.

Chronicle, San Francisco. 1970. "A Zodiac threat to newsman." San Francisco Chronicle , October 31: 7.

Cole, Michael F. 2020. The Zodiac Revisted: The Facts of the Case. San Francisco, CA: Twin Prime Publishing .

Drake, Rossiter. 2007. "A magnificent obsession with the Zodiac killer." San Francisco Examiner, March 2: 28.

Flaherty, Frances. 1969. "New letter by Zodiac claims seven slayings." Times-Herald (Vallejo, CA), November 12: 1.

—. 1969. "Teenagers' s;ayer still at large." Times-Herald (Vallejo, CA), March 30: 1.

Flaherty, Francis G. 1968. "Investigators lacking clues in 2 slayings." Times-Herald (Vallejo, CA), December 22: 1.

Glover, Malcolm. 1969. "Hundreds of 'Zodiac' tips flood Bay police." San Francisco Examiner, October 18: 1.

Lowe, Lindsay. 2024. Who was Arthur Leigh Allen? October 29. Accessed February 14, 2025. https://www.today.com/popculture/zodiac-killer-arthur-leigh-allen-rcna176996.

McClatchy Newspapers Service. 1969. "Vallejo Police seek gunman who killed woman, shot man." Sacramento Bee, July 5: 1.

Michelman, Jordan. 2020. "What If You Solved the Zodiac Killer Mystery and No One Believed You? ." Portland Monthly, December 16.

O'Connell, Oliver. 2021. Gary Poste: Who was the alleged Zodiac killer identified by ‘Case Breakers’? October 7. Accessed February 14, 2025. https://www.the-independent.com/news/world/americas/crime/gary-post-zodiac-killer-suspect-b1933700.html.

Peterson, Dave. 1969. "2 survivors tell what they can on 'Code Killer'." Times-Herald, October 1: 1.

Sacramento Bee. 1969. "Officers check leads in Berryessa killing." Sacramento Bee, October 3: 27.

San Francisco Examiner. 1969. "'Cipher Killer's' new letter." San Francisco Examiner, August 4: 1.

—. 1969. "'Cypher Killer' hunt is pressed." San Francisco Examiner, August 6: 57.

—. 1969. "School bus alert on mad killer." San Francisco Examiner, October 17: 1.

—. 1969. "Sketch made of killer in taxi slaying." San Francisco Examiner, October 14: 6.

—. 1970. "Zodiac 'greeting' to police: 'enjoy yourselves at my blast'." San Francisco Examiner, May 1: 50.

Smith, Dave. 1971. "17-plus victims claimed in letter by Zodiac Killer." Los Angeles Times, March 16: 3.

—. 1969. "Zodiac Killer--chilling portrait of madness." Los Angeles Times, October 15: 1.

—. 1969. "'The Zodiac' lives inconspicuously, but murders with flourish." Sacramento Bee, October 10: E12.

Smith, Jane. 1969. "Girl stabbing victim dies in Napa hospital." Times-Herald (Vallejo, CA), September 30: 1.

Times-Herald. 1969. "Cryptogram deciphered by teacher." Times-Herald (Vallejo, CA), August 9: 1.

—. 1968. "Hunt maniac in murders of teenagers." Times-Herald (Vallejo, CA), December 23: 1.

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Episode 248: Zero to CEO: Beyond the Barrel of Oil and Opportunity with RJ Burr