As with most psychopathic serial killers, the urge to kill and mutilate grew inside him as time went by. He kept it at bay by furiously masturbating to the memory of both being raped and taking bloody revenge. But, at a certain point, the memories simply did not cut it. He needed a fresh kill, he needed release. And so it was, that on the morning of Saturday, the 31st of March 31, 1962, William MacDonald purchased another long-bladed, razor-sharp sheath knife from Mick Simmons sports store. He packed it in his bag with his raincoat and a plastic bag. His heart was pounding from excitement, he felt powerful again as he went on the prowl.