OK on last episode of season 3 many things revealed for me ?!!!
First how Timothy Carter knows things only red john knows and he is not RJ ?? so my guess is Timothy Carter know red john or his relatives
Jane took Gale Bertram to  ((( Pinewood shopping mall >> place where timothy were killed by jane ))) and there was cho and rigsby also ,,, SO NOW
How timothy carter know that place ??? is this a coincidence for him to be there >> NO ,,,, a place who (jane - bertram - cho - rigsby ) only know it ,, Lisbon may know but i am not sure about that!
so my guess is that some one of the 4 people tell timothy to go there and act as to be a red john to play with jane
** bertam could be highly suspect and then cho may be ??????

Okay. I think it is Kimball Cho for various reasons. But first. The easiest way to verify if your theory is right or not is if you can disprove it. For example. My brother thinks that Red John is Patrick Jane. But it is quite easy to disprove that red John is Patrick Jane because there are so many instances to where it is almost impossible for Patrick Jane to be Red John. For example, when Patrick Jane is held captive and almost murdered by the two teenagers making a movie, Red John comes to save Patrick Jane and while doing so he shoots and cuts open the two teenagers for mocking his work. But to completely disprove that Red John is Patrick Jane, you have to look at the obvious. First being that why would Patrick Jane murder his own family? Second and most obvious reason; why would Patrick Jane spend all of this time obsessing over and searching for Red John if he were Red John himself? It's common logic. Okay, moving on. I think Red John is Kimball Cho because I haven't yet found a way to disprove my theory. For one, Kimball Cho rarely shows during the Res John episodes; he's almost in the shadows. Second, Kimball Cho seems to be the only on the team without major trauma in his or her past. Patrick Jane's family was murdered. Theresa Lisbon's mother died in a car crash and her father killed himself. Rigsby's father is a drug dealer, drinker and ex convinct. Grave Van Pelt shot her own fiancé and she also mentions something in one of the first episodes about a troubled past but she won't elaborate on it. While Kimball Cho has no trauma that we know of. Not only that, but Kimball Cho also seems to be drawn to trouble. Kimball Cho has had sexual intercourse with a prostitute, he has taken too many pills and he was a former gang member. Kimball Cho is also never happy, he rarely smiles and has a cold vibe about him. Kimball Cho never opens up about his personally life and whenever anything involving his life outside of work gets brought up he quickly becomes immensely defensive. Kimball Cho keeps to himself most, if not all of the time and I believe he keeps his silence because he is hiding a dark secret. I believe that secret is that Kimball Cho is Red John. I have yet to find any piece of information or evidence that disproves my theory. Therefore, I'm standing beside it until other sources say otherwise. Now I'm only twelve, so I don't know too much about crime and detective work; but I believe my theory holds strong evidence that will be difficult to disprove. Let me know what you think regarding my theory! Thank you.