He Used A Claw Hammer. . . Frankie Cochran knew her boyfriend, David Gerard, was possessive, controlling, and prone to violent rages. When she tried to break up with him, Gerard threatened her with a hammer. One week later, he used it to club her in the head. Again. And again. Then he stabbed her in the throat--and left her for dead. . . And A Sharp Knife. . . Miraculously, Frankie survived--but cops began to suspect Gerard of other vicious crimes...