However, one of the most intriguing things about the Zodiac Killer was his ciphers. As per reports, the killer had mailed ciphers or encrypted messages. The Zodiac Killer had sent the cipher in ...

The Zodiac Killer was known for sending cryptic letters about his crimes to newspapers and police, per the San Francisco Chronicle. These letters often included ciphers and coded messages.

The Zodiac killer is one of the most notorious killers of all time, but has never been caught. Now, a family who knew the prime suspect Arthur Leigh Allen have come forward for the first time in the ...