Half Nelson (1985)

Rocky Nelson is a former New York cop who is trying to make it as an actor in Hollywood. However, like most actor-wannabes, he is still looking for his big break, and his lack of stature doesn't endear him to the directors. So, he is currently working for Beverly Hills Patrol, a private security agency that caters to the needs of the Hollywood elite and who also try to keep things quiet for their clients. And every now and then Rocky comes across a case which requires him to slip into his old cop mold, which doesn't thrill his boss or the police lieutenant that he encounters.