The Null Files | The Zodiac Sent a Cipher in 1969. It Took 51 Years to Read It.

Description:
In 1969, the Zodiac Killer mailed a coded message to police. He said it contained his name.

The FBI couldn't crack it. The NSA couldn't crack it. For 51 years, nobody could.

Then three amateurs solved it in 51 days.

What they found inside changed nothing. The case is still open.

— The Null Files | True crime. Real cases. No answers.

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