Stefano, son of the Mafia Don Angelino Ferrante, is killed by Gaspare Ardizzone (John Saxon) for refusing to sell some valuable land. The old don sends for Ferrante Santino Billeci from America, in the hope that he'll be able to help in getting revenge. But Gaspar, meanwhile, is becoming the most powerful and ruthless boss of the area...
Unfortunately the movie Family Killer is not yet available on HBO Max.
| Directing | Vittorio Schiraldi | Director |
| Writing | Vittorio Schiraldi | Novel |
| Camera | Marcello Gatti | Director of Photography |
| Writing | Vittorio Schiraldi | Screenplay |
| Production | Arcangelo Picchi | Producer |
| Sound | Enrico Simonetti | Original Music Composer |
| Editing | Franco Fraticelli | Editor |
| Art | Enrico Sabbatini | Production Design |
| Costume & Make-Up | Enrico Sabbatini | Costume Design |
| Crew | Basilio Patrizi | Special Effects |
