Family Killer(1973)

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...