I do agree with the cult theory of Brett Styles, but don't think its him. He definately has a big part of was is to be unveild. We see he is gonna be in next weeks episode his third appearance why else would have he been on so many times if he didn't turn out to play a key role in the red john saga. I also think Van Pelt has something to do with it whether she actually knows it or not. Last season her and styles have a moment where they connect while hes in the cell. Also a few seasons back styles tell jane he knows more about red john then he will ever know