Mean Frank and Crazy Tony (1973)

There's trouble in Frankie Diomede's criminal empire in Genoa. A French gangster has moved into his territory, so he flies home to take care of business. He promptly has himself arrested so that he'll have the perfect alibi when the bodies start piling up. But it turns out his enemies have enough juice to keep him in prison, his associates start dying and the attempts on his life start. Cue Tony Breda, a wannabe wiseguy, who has a plan to spring Frankie from jail.

Comedy, Crime