Underclassman

Tre Stokes is a 23-year old undercover cop and goes to Westbury High to figure out the death of a student. He befriends Rob Donovan and soon figures out that he has been stealing the cars at parties. Near the end, it is revealed that the principal of the school had been blackmailing Donovan, and was ringmaster of the crimes. After being kicked off the force by his father-figure police chief, Tre solves the case and is reinstated. There is a scene where Tre stops someone he thinks is a drug dealer, but later finds out he's also an undecover cop, and by busting him, he foils his attempt to find out who the drug dealers' suplliers are (this is an almost word for word replica of a scene from Point Break).