• Horan’s book The Myth of the Zodiac Killer

Was the Zodiac Killer a real serial murderer—or a story manufactured by hoax calls, forged letters, and planted evidence? In this episode, Jimmy Akin and Dom Bettinelli examine the “Zodiac hoax” proposal by testing seven key clues: the two phone calls, early letters and the Z408 cipher, the Lake Berryessa costume symbol, the car-door message, and the letter containing a bloodied piece of Paul Stine’s shirt. They compare which explanation is more plausible at each step: a single killer constructing a persona, or multiple people faking links between crimes. The discussion also tackles probability stacking—how hoax theories become less likely as they require more independent actors or a larger conspiracy—and closes with listener feedback on the Calvine UFO sighting. Learn more: https://mysterious.fm/406 Become a Patron: https://GiveMysterious.fm Further Resources: • Horan’s book The Myth of the Zodiac Killer: https://amzn.to/4r8lI55 • ZodiacKillerFacts.com: https://zodiackillerfacts.com/ • Critique of Horan’s proposal: https://zodiackillerfacts.com/zodiac-theories/zodiac-theories/the-zodiac-hoax-theory/ • Critique of Robert Graysmith’s book Zodiac: https://zodiackillerfacts.com/zodiac-theories/the-accused-the-accusers/graysmith-unmasked-2/graysmith-unmasked/ Chapters: 0:00 - MYS406 0:11 - Previously... 1:23 - Intro 2:57 - Reason Perspective 4:36 - 7 things to explain 5:18 - 1. The first phone call 12:22 - 2. The first letter 32:51 - 3. The second letter 33:27 - 4. Zodiac symbol at Lake Berryessa 37:30 - 5. Message on car door 49:05 - 6. The second phone call 55:05 - 7. The third letter 57:20 - Thank you to Patrons 57:51 - Sponsor: Rosary Army and School of Mary 58:15 - Sponsor: The Grady Group 58:31 - The scope of the hoax theory 1:05:04 - Others accused 1:10:36 - A changing theory 1:16:33 - Jimmy's own theory 1:19:37 - Bottom Line 1:23:13 - Further Resources 1:23:33 - Feedback on #395 Calvine UFO Sighting 1:39:09 - Your mysterious feedback 1:39:50 - Thank you to Oasis Studio 7 1:39:54 - Jimmy’s YouTube channel 1:40:37 - Next Time: Library of Alexandria and more Patron questions 1:41:11 - Follow the show 1:41:23 - Get your Mysterious merch 1:41:30 - Show notes 1:41:37 - Become a Patron 1:41:46 - Become a Sponsor 1:42:45 - Outro #ZodiacKiller #TrueCrime #MysteryPodcast #JimmyAkin #MysteriousWorld #Z408 #LakeBerryessa #PaulStine #FaithAndReason #UnsolvedMysteries