Nitti's bodyguard

When Nitti meets Capone on Palm Island and is talking to his bodyguard about not worrying about the Feds and worry about the guy coming up behind ya...
The characters name is Tony Amatto but I"m guessing that was supposed to be Tony Accardo ??
It should of been Paul Ricca since he put the screws to Nitti before he opted out of prison and killed himself...