In 1968 and '69, the Zodiac Killer attacked seven people in four different Northern California locations. His first three targets were couples in secluded areas; two of these people survived. His last known victim was a taxi driver killed on October 11, 1969, in San Francisco. During and after his killing spree, Zodiac received attention and spread fear as he shared ciphers, letters, information and threats with authorities and the public. No murder has been officially linked to the Zodiac Killer since October 1969, but the unsolved case continues to fascinate.