Coupable (2008)

A whodunit is more like a who-dun-who in the French thriller Coupable (2008). After a Mr. Kaplan is discovered with a kitchen knife in his back, suspicion immediately turns to the maid, Marguerite (Hélène Fillières), whom many suspected was having an affair with the deceased. But as detective Lucien Lambert (Jérémie Renier) digs deeper into the case, he discovers that Kaplan and his wife Blanche (Anne Cosigny) had clashed over Kaplan's inability to produce children. So who's the killer? We're not sure, but we do know that Dinara Drukarova is guilty of the crime of topless in the first degree. We wouldn't mind slapping some cuffs on her...