Death Wish 3

Paul Kersey, the vigilante, returns to New York to visit a friend. But when he arrives he finds his friend dead, and the police enter and find him standing over the body holding a gun. At the station a police lieutenant recognizes him as the vigilante, and releases to go after the gang that killed his friend, who are led by the deadly Manny Fraker. So Kersey moves into his friend's apartment and along with his friend's friend, Bennett, they try to get the gang and help the neighbors who are being plagued by Fraker and his gang.