Gang War

Bronson plays Alan Avery, a mild-manned L.A. schoolteacher who elects to stay mum after witnessing a gangland slaying. Forced to testify against the killers by the cops, Avery is turn terrorized by the Mob, who subsequently bring about the death of Avery's pregnant wife Edie (Gloria Henry). Meek and mild no longer, the outraged Avery embarks upon a one-man vendetta against the villains. (allmovie.com)