Vigilante (1983)
Nick (Fred Williamson) is leading a group of factory workers to clean up the streets of New York by brutallly beating and killing criminals. Eddie Marino (Robert Forster) doesn't really approve of this behaviour until a gang's actions affect him personally. Eddie comes home one night to discover his wife Vickie (Rutanya Alda) and son Scott have been attacked. Scott dies from a bullet wound. After the gangleader bribes the judge and avoids prison, Eddie changes his mind about Nick's vigilante group and consequently embarks on a personal mission to end the gang's activities...permanently.