Arthur Leigh Allen: The Zodiac Killer’s Prime Suspect? | Episode 9

Episode 9 of The Zodiac Killer series focuses entirely on Arthur Leigh Allen — the man law enforcement pursued for decades and the only suspect ever publicly named in the case. From Donald Cheney’s explosive 1971 account to Michael Mageau’s later identification, Allen’s case is packed with disturbing coincidences, alleged admissions, and behavior investigators found impossible to ignore. We break down the full timeline: Allen’s background in Vallejo, his reported pre-crime statements, the Zodiac Sea Wolf watch, the Lake Berryessa alibi, the search warrants, the pipe bombs, and the claims made in Netflix’s 2024 documentary This Is the Zodiac Speaking. But this episode also examines the other side of the case: the fingerprints that did not match, the handwriting experts who excluded him, the partial DNA that failed to connect him, and why he was never charged. Was Arthur Leigh Allen the Zodiac Killer — or the most compelling wrong suspect in true crime history? 00:00 Prime Suspect Setup 01:43 Allen Early Life 04:24 Grievances And Red Flags 05:54 Cheney Bombshell Tip 07:00 Lovers Lane Details 11:54 Credibility And DNA Wrinkle 15:10 First Police Interview 16:26 Watch Alibi And Knives 19:33 Handwriting Excludes Allen 20:43 Search Warrant And Arrest 22:51 Spinelli Names Allen 25:27 1991 Search And Bombs 27:48 Blue Rock Springs Revisited 28:58 Mageau Photo Lineup 30:55 Voice Witness Limits 32:28 Allen Dies and Search 33:14 DNA and Handwriting Tests 35:52 Forensic Caveats Explained 37:01 Netflix Seawater Claims 40:49 Beach and Riverside Trips 44:35 Confession Accounts Weighed 46:19 Case For and Against 53:20 Why Allen Endures 56:53 Final Question and Next About Crime Time Inc. Season 5 of Crime Time Inc. broadens its reach across two sides of the Atlantic. This season features cases from Scotland and across the wider UK — rooted in real investigative experience — alongside deep dives into some of the most infamous murder cases in American history. Hosted by former detectives Simon and Tom, with experience in both the UK and the United States, including time working alongside the FBI, the show strips away sensationalism to explain how crime and justice really work. Two crime worlds. One podcast. New episodes released regularly throughout the season. Our Website: https://crimetimeinc.com/ If you like this show please leave a review. It really helps us. Please help us improve our Podcast by completing this survey. http://bit.ly/crimetimeinc-survey Hosted on Acast. See acast.com/privacy for more information.