Born Marcello Giuseppe Caifano. During the mid-1920s, Caifano joined the 42 Gang, a Chicago street gang, with future Outfit members such as Willie Bioff, Samuel Battaglia, and Salvatore "Momo" Giancana. By 1929, Caifano's rap sheet included convictions for burglary, extortion, larceny, and interstate fraud. As he matured, Caifano followed other 42 Gang members into The Outfit. During this period, Caifano was considered a prime suspect in the murder of gambler Frank Quotrocci after police discovered a hat at the crime scene with the initials "M.C." It was later accepted, however, that Outfit boss Al Capone committed this murder.