Question: are there 2 zodiac killers?
Answer: Between the first homicides in Benicia and the Stine killing, there were two more Zodiac attacks on dating couples: In July 1969 in Vallejo, he shot Michael Mageau, 19, and Darlene Ferrin, 22; and in September 1969 at Lake Berryessa, he stabbed Cecelia Shepard, 22, and Bryan Hartnell, 20.