The Zodiac Killer: America's Most Terrifying Unsolved Mystery

In the late 1960s, a killer stalked Northern California — then turned his crimes into a public puzzle. He wrote letters to newspapers, signed them with a crossed-circle symbol, and hid his identity inside ciphers that took decades to crack. This is the complete story of the Zodiac Killer: the murders at Lake Herman Road and Blue Rock Springs, the Lake Berryessa attack, the murder of cab driver Paul Stine, the 408 and 340 ciphers, the suspects — and why, more than 50 years later, nobody knows who he was. New true-crime documentaries every day. Subscribe to Criminal Chronicles and never miss a case. #TrueCrime #ZodiacKiller #UnsolvedMystery #ColdCase #CriminalChronicles