Kindergarten Cop (1990)
John Kimble is a tough city cop who's been on the trail of drug dealer Cullen Crisp for years. He finally tracks Crisp down but it seems the only person that can testify against him is his ex-wife. The problem is she's disappeared and all Kimble knows is the name of the school in Oregon where her son attends. When things don't quite go to plan, Kimble finds he has to go undercover on his toughest assignment yet - Kindergarten teacher!