So: Did Laurel kill Sandrine out of anger after learning she did conspire to kill Wes? We'll have to wait until the (expected but not confirmed) season 5 to find out. If Laurel is a killer, she didn't have Frank hide the body — he is just as in the dark as she claims to be. (Secretly, I do wonder if Frank wants Laurel to have a body count under her belt... maybe would even out the playing field for their future relationship.)