Zodiac Killer The Zodiac Killer operated in California during the 1960s and 1970s. True False None The Zodiac Killer was identified and arrested in 1978. True False None The Zodiac Killer sent ciphers and letters to the media, taunting investigators. True False None The Zodiac’s symbol was a circle with a cross through it. True False None The Zodiac claimed to have killed 37 people, but only 5 confirmed victims are officially linked to him. True False None Time's up Most Popular Most Popular