Watson was with Manson when he first heard the White Album, and he took part in the Tate murders and the LaBianca murders. He is the only killer to participate directly in every one of the seven homicides, and he was the sole killer of at least three of the victims. He told other Family members, "It seemed like I had to do everything." He separated himself from the Family when he and Manson first heard the White Album, and he did not rejoin until the following March 1969. By that time, Manson's prophecy had captured the group's imagination, but Watson took a while to grasp its details.