The Zodiac Killer: Letters, Ciphers, Five Confirmed Murders, and No Arrest Ever Made

Between 1968 and 1969 a killer operating across Northern California murdered at least five people in cold blood, then wrote taunting coded letters to newspapers boasting about the crimes and threatening more. He was never identified. Never arrested. The Zodiac Killer case has haunted American true crime for over fifty years — and the ciphers he left behind are still being decoded today.