Tommy Carroll's criminal career with the Dillinger gang was brief but violent. He participated in the violent Sioux Falls bank robbery in March 1934 and drove the getaway car in Mason City a week later. On June 7, 1934, he and his girlfriend, Jean Delaney, were in Waterloo, Iowa. After being spotted by local detectives while gassing up his distinctive Ford V8, a chase ensued. It ended in an alley behind a police garage, where Carroll was shot and killed. Delaney was captured shortly after, marki