The Seven-Ups (1973)
The Seven-Ups is a 1973 American dramatic thriller film produced and directed by Philip D'Antoni. It stars Roy Scheider as a renegade policeman who is the leader of The Seven-Ups, a squad of plainclothes officers who use dirty, unorthodox tactics to snare their quarry on charges leading to prison sentences of seven years or more upon prosecution, hence the name of the team.
More at Wikipedia.