Zodiac Killer: Lake Berryessa Stabbing (Hartnell & Shepard)

Two former senior detectives examine the Zodiac Killer’s most disturbing escalation: the Lake Berryessa attack.

In broad daylight, the Zodiac abandons the gun, dons a costume, and turns murder into performance. We unpack what this shift reveals about planning, psychology, investigative blind spots in 1969, and why—despite unprecedented evidence—the killer still walked away.

We also explore cryptography, Air Force links, witness behaviour, and the uncomfortable reality that the Zodiac wounded more victims than he killed.

• What we cover (chapter guide)
• 00:00 — Cold open: Episode context; why Lake Berryessa marks a turning point
• 01:10 — The silence before the storm: August 1969 and the lull after the cipher
• 05:30 — Setting the scene: Pacific Union College, Bryan Hartnell, Cecelia Shepard
• 10:15 — Lake Berryessa: daylight, isolation, and opportunity
• 14:40 — Witnesses before the attack: watching, waiting, selecting
• 18:10 — The costume appears: hood, symbol, and psychological theatre
• 22:30 — Control and deception: the escaped-convict story and premeditation
• 26:50 — Knife vs. gun: why this choice matters more than it seems
• 32:20 — The attack: sequence, survival, and what Hartnell could tell police
• 38:10 — Aftermath: the car door message and the call to Napa Sheriff’s Office
• 42:45 — Evidence rarely seen in Zodiac cases: shoe prints, palm print, handwriting
• 47:30 — The Air Force connection: wing-walker boots and cryptography skills
• 53:10 — What 1969 police didn’t have: DNA, databases, behavioural profiling
• 59:40 — Performance vs. panic: what the shaking hands reveal
• 1:04:30 — Victim focus: remembering Cecelia Shepard
• 1:09:20 — Why this case still matters: escalation, audience, and unfinished justice

(Timings may vary slightly by platform.)

• Key takeaways
• “This wasn’t impulsive.” The costume, bindings, and knife show planning and rehearsal.
• “Daylight changes everything.” Witness quality improves—but so does offender confidence.
• “The Zodiac wasn’t trained to kill.” He wounded more victims than he killed, even at close range.
• “Evidence isn’t the same as answers.” Lake Berryessa produced more physical clues than any prior attack—yet still no suspect.
• “This was theatre.” The Zodiac needed to be seen, remembered, and talked about.
• 
  
• Helpful context
• The Lake Berryessa attack (27 September 1969) is the only confirmed Zodiac assault with surviving victims and a full eyewitness account.
• It is also the only Zodiac crime involving a costume and a knife, making it critical for behavioural analysis.
• Listener note
• This episode contains discussion of violent assault and homicide. Listener discretion advised.

• Call to action
• If you value case-led analysis grounded in real policing experience, follow or subscribe.
• Share this episode with someone who thinks the Zodiac was “just a cipher and some letters.”

You can buy the books mentioned in the podcast's by clicking the links below

Tom's Best Selling Book:

Ruxton: The First Modern Murder Paperback Edition

Ruxton: The First Modern Murder Kindle Edition

Simon's Best Selling Book:

The Ten Percent Paperback Edition

The Ten Percent Kindle Edition

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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.

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