Pretty Maids All in a Row

Pretty Maids All in a Row is an American mystery film that is part dark comedy, part murder mystery. It starred Rock Hudson alongside Angie Dickinson, and was released on April 28, 1971. Roger Vadim directed the film, which Gene Roddenberry produced, having dramatized a 1968 novel written by Francis Pollini into the screenplay from which Vadim worked. This was Roddenberrys only feature film writing credit.

Michael Tiger McDrew Hudson is the high schools football coach and guidance counselor. But there is another aspect of Tigers character He is quite fond of sexual encounters with female students. Tiger tries to befriend Ponce and help him deal with his sexual needs by encouraging him to seek the affections of a sexy substitute teacher, Miss Betty Smith Dickinson.Meanwhile, one young girl after another turns up dead. A police detective captain, Sam Surcher Telly Savalas, investigates the case but never obtains enough courtroomadmissible evidence to make an arrest. Tiger is suspected, but never caught redhanded. Ponce, however, discovers that Tiger is guilty when he discovers evidence hidden in his office. Tiger drives Ponce to a pier where he confesses, and apparently commits suicide by driving his car into the ocean with Ponce as his witness. However, Surcher suspects that Tiger has faked his own death when he notices that his supposed widow is hiding a ticket to Brazil. ........

Source: Wikipedia