Gang War

In this crime drama, a meek high-school teacher witnesses a mob hit and must testify against the assassins. The mob gets revenge by attacking his house. His pregnant wife is killed during the attack. The teacher goes mad with rage and grief and begins plotting his revenge against the gang leader who has Mafia connections. The teacher sneaks into the crimelord's mansion and watches the man go nuts. The teach then calls in the cops and the man is finally jailed.