The Zodiac Killer claimed to have murdered 37 people. The killings, which paralyzed Californians with fear for years, began in 1968, and soon after mysterious letters were sent to news outlets, many featuring cryptograms.
From this point on, the killer started communicating via letters and greetings cards. Each of these messages was concluded with the crossed-circle design pictured above. Later it became known as the Zodiac signature.
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From this point on, the killer started communicating via letters and greetings cards. Each of these messages was concluded with the crossed-circle design pictured above. Later it became known as the Zodiac signature.
