Mortal Sins (1992)

In this tense and surprising thriller, a parish priest is torn between honoring his vow to never violate the sacred trust between a confessor and a cleric and telling the law that one of those he listens to is a serial killer who is ritually killing the women in his congregation. Devout and kindly Father Cusack is still new to the priesthood and takes his vows very seriously. Because he cannot tell the police, he tries to stop the killer on his own and nearly loses his life in the process. ~ Sandra Brennan, All Movie Guide