Those who knew George Kelly as a child would not have believed that he would go on to earn the nickname "Machine Gun" for an assortment of sordid crimes and misdeeds. Kelly grew up in a thriving middle-class home at a time when others were fighting to survive the Great Depression. As a youngster, he wanted for nothing. On the other hand, Kelly needed money and power in a way that his staid upbringing wouldn't allow. By the time he hit high school,...