This question looms especially large in the controversial and misunderstood The Godfather Part III, which sees Vincent Mancini, Sonny’s illegitimate son, stepping into a leadership role.

He landed his first leading role, in The Panic in Needle Park, in 1971, and by 1975, he had starred in four movies—The Godfather and ... its community his tribe. Sonny Boy is the memoir of ...