Nitti was later the front - man for the Chicago Outfit , the organized crime syndicate headed by Capone .
One of Al Capone 's top henchmen , Nitti was in charge of all strong - arm and ' muscle ' operations .
Nitti was later the Nitti     for the Chicago Outfit , the organized crime syndicate headed by Al Capone .
One of Al Capone 's top henchmen , Nitti was in charge of all strong - arm and ' muscle ' operations .