Now that the winter finale is done, I'm going to revisit who did what, who knows who did what, and who thinks who did what. Just a little refresher before all the craziness begins again in Feb!
Lila - Frank killed her on Sam's orders. Sam and Frank both know that Frank killed Lila. However, the murder of Lila was pinned on Lila's boyfriend (Griffin? I think was his name), Sam and Rebecca. None of these people were actually found guilty (although I believein the show, it's implied that Sam was believed to be guilty)
Sam - Wes killed Sam to defend Rebecca. Wes, Laurel, Connor, Michaela, Annali