Zodiac’s mysterious and bizarre 32-character cipher

A young San Francisco cop is gunned down in his patrol car. Days later, the Zodiac claims responsibility—and sends a cipher that could point to a bomb. Can Dr. Garlick decode the bomb code?  Or is it a dud?

Zodiac Killer’s Z13 cipher solved?

In my latest episode, computer science professor Dr. Ryan Garlick finally shares his unique take on Zodiac’s mysterious Z13 cipher. It’s sharp. It’s logical. Could it be the real answer?

Let’s Crack Zodiac #22 – Hardens’ Letters to Kahn

The Zodiac Killer thought his cryptograms were unbreakable—until two ordinary citizens, Donald and Bettye Harden, cracked them before anyone else. Now, newly discovered letters from Donald reveal how they did it. Step into the mystery with me in my latest…