The Rookie (1990)

Nick Pulovski is a cop, who is presently assigned to the auto theft division and who for the most part of his career has not done anything worthwhile. But when he discovers that a man named Strom is the brains behind a major car theft and chop shop ring, he sees this as his opportunity to do something. After his partner is killed, the case is then transfered to homicide, so he is taken off the case. And he is assigned a new partner, David Ackerman. a cop who has just recently been promoted to detective. But Pulovski feeling as if Strom is his decides to continue pursuing him but Ackerman who tries to play by the rules is not sure what to do, and he is also a little afraid cause of a childhood incident.