I was looking through some footage, and I noticed something, though it may not mean anything. In the scene where Jane shoots Timothy Carter, there is a man there in a sheriff's uniform, much like McAllister's. I don't think you can see his face, but he has a similar build, and Bruno Heller has said that Red John was at the Mall. Also, when Rebecca is poisoned in the hall, a man in a sherrif's uniform would fit right in. I want to go back now and look for more! I don't think we can know for sure who it is yet, but maybe...