This article contains discussion of violence.

“Accompanying the letters were mysterious ciphers spelled out in astronomical symbols.

These cryptogramsrepresented a new and perplexing element to the pursuit of the Zodiac.

zodiac killer

The first was sent in 1969 and became known as the Z408 because it contained 408 astronomical symbols.

The cipher was named the Z340, containing 340 symbols.

Much of it was misspelled, andit contained some unintelligible gibberish, but also some chilling language.

Custom Doctor Who image of David Tennant looking shocked as the Tenth Doctor with Midnight in the background

Timothy Olyphant as Vincent looking confused while aiming a revolver in Havoc

Zodiac Killer’s Letters

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The police sketch of the Zodiac killer

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The Gemini Killer & the real life Zodiac Killer

Jim Mordecai next to a drawing of the Zodiac killer

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this is the zodiac speaking

After decades of mystery, the Seawater family presents new evidence about the Zodiac Killer, sharing their story and naming the only suspect agreed upon by detectives.

This Is the Zodiac Speaking