On April 20, 1970, the Zodiac killer provided a communication to the San Francisco Chronicle newspaper
By Tom Voigt | Founder: Zodiackiller.com | tomvoigt@zodiackiller.com

The cipher shown above is too short to have a definitive solution, according to the FBI.

In 2015, a buried bomb of significant age was unearthed in Santa Rosa, Cal. Zodiac?
(All of the communications featured in my updates were authenticated by police.)
For in-depth information and discussion about all of the Zodiac killer’s communications — including ciphers — see my Zodiackiller.com discussion forum.
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