Freudian Excuse: Father Regis. As a child, he was a witness to his mother's murder at the hands of his father, after the latter found out she had an affair. This led him to develop an intense hatred of cheating women.
Hoist by His Own Petard: One of the victims mentions that Father Regis sent her flowers, white lilies to be exact. This allows the SVU to connect her cases to a series of rapes.
Serial Rapist: Regis targets adulterous women for rape, based on his Freudian Excuse. He learns of their actions in the confession box and then attacks them, using a belt to choke him just like his father did on his mom.
Wolf in Sheep's Clothing: A rape victim talks about what a good man Father Regis is and how he sent her flowers.
