Just shows you that there's no honor among thieves, Mick.
Francesco Uole (aka Frankie Yale) was Capone's mentor and "godfather in crime" (though Capone never was in the Mafia as we know it). Lawrence Bergreen, Capone's most recent biographer, claims that Yale was the one who whacked Torrio's uncle, Big Jim Colosimo, and later was in charge of whacking Dion O'Banion, the North Side gang leader who double-crossed Johnny Torrio. Yale ahnd Capone became partners in booze, with Yale running a trucking pipeline that brought bootleg booze from Brooklyn to Chicago. But when Yale crossed Capone by diverting his shipments and claiming that they were "hijacked," no history or gratitude applied--he got the tommygun from his former protege.