Van Zandt
Van Zandt was one of two individuals who are responsible for the creation of Evil Buu. He decided one day to start hunting people. He and his partner Smitty went from town to town, gunning down everyone in sight. Their quest eventually brought them to Mr. Satan's house, where Van Zandt shot Bee. However, Fat Buu was able to heal the puppy. Mr. Satan quickly located the two gunmen and gave them a much-deserved beating, but they escaped.
The next day, however, Van Zandt returned to the house and caught Mr. Satan alone. In a horrifying scene, he shot the World Champion in the head. This sent Buu over the deep end, and he split apart into two halves: Evil Buu and the 'normal' Fat Buu. Before he did anything else, Evil Buu blew Van Zandt away with a huge ki blast.