The Zodiac Killer: California's Unsolved · 3 Sep 2026 · 12 min

Presidio Heights: The Murder the Zodiac Almost Got Away With

On October 11, 1969, the Zodiac Killer shot taxi driver Paul Stine in one of San Francisco's most residential neighborhoods — and walked past police officers who never knew what they were looking at. This chapter follows the murder, the botched response, and the investigation that would define the case for decades.

The Zodiac Killer: California's Unsolved
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Presidio Heights: The Murder the Zodiac Almost Got Away With

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What's covered

The Night Paul Stine Died

Here's what makes the Paul Stine murder different from everything that came before it. The Zodiac had killed in darkness, in isolated spots, along quiet roads on the edges of cities.

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The Ride That Ended It

Paul Stine was twenty-nine years old. He was a graduate student and a part-time taxi driver, working nights in San Francisco to pay his way through school.

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The Shirt Becomes a Letter

Two days later, a letter arrived at the San Francisco Chronicle. Inside was a piece of Paul Stine's shirt.

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The Investigation Intensifies

The San Francisco Police Department came under intense scrutiny after the Stine murder. The dispatcher error.

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Arthur Leigh Allen

The name that would come to dominate the investigation was Arthur Leigh Allen. He was a convicted child molester, a Navy veteran, and a resident of Vallejo.

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The Question the Evidence Won't Answer

The case against Allen also ran into another problem. The Zodiac's letters were written by someone with a distinct and consistent hand.

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The 340 Cipher and What It Didn't Say

The Zodiac sent four major ciphers over the course of his correspondence. The first, known as the four-oh-eight because of its length, was solved in nineteen sixty-nine by a Salinas schoolteacher and his wife, working without computers, without FBI assistance.

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Why the Night of October Eleventh Still Matters

Paul Stine's murder marked the end of the confirmed kill sequence, but not the end of the Zodiac's presence. The letters continued through the early nineteen seventies.

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Chapter summary auto-generated from the verified script. Listen to the full episode for the complete content.

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