The Sting

S1 E2: Police begin the extensive investigation into Elaine's murder by uncovering an obsessive and bizarre relationship. Disturbing text messages reveal a psychopath grooming his trusting victim under the guise of sadomasochistic practice and shockingly demonstrate the bloodlust obsessions of the killer and the level to which his victim was willing to acquiesce. But unlike a killer with mental illness or some criminal motivation, the chief suspect is the opposite of what police expect.