While the gangster film may have enjoyed its heyday in the 1930s and '40s, it has remained a movie staple for almost as long as cinema has existed. From the early films of Humphrey Bogart, James Cagney, and Edward G. Robinson to modern versions like Bugsy, Public Enemies, and Gangster Squad, such films capture the brutality of mobs and their leaders. In Gangsters and G-Men on Screen: Crime Cinema Then and Now, Gene D. Phillips revisits some of the...