'Bad Lieutenant.' TRASH: Intended to shock, with a drug-addicted police detective, played by Harvey Keitel, investigating the rape of a nun. At one point, we also get a shot of full-frontal Harvey. ART: It can't always be the neat-and-tidy cases of "Law & Order." Instead we get the no-holds-barred portrayal of a self-destructing policeman told in a frankly adult manner.