The Zodiac took ownership for his last victim’s life in a letter to the San Francisco ... that Donald and Bettye Harden had ...

The Zodiac Killer murdered five people ... The second cipher, known as Z340, resembled the first: a grid with letters, backward letters, shapes, and other symbols. No one could crack it.

For decades, the infamous Zodiac Killer — who killed at least five people in California in the 1960s and claimed to have killed more than 30 — has never been identified, despite his letters to ...