7: The Letters and the 340 Cipher

Following the murder of Paul Stine, the Zodiac Killer shifted his focus from physical violence to psychological terror. In this episode, we explore the letters that the Zodiac sent to newspapers, each more menacing and cryptic than the last. From threats against school children to the infamous 340-character cipher that would remain unsolved for over 50 years, the Zodiac continued his deadly game, toying with the police and the public alike. Dive into the mind of a killer who thrived on fear and chaos as we decode the chilling letters and examine the unsettling mystery of the unbroken ciphers.