Clearly the series has gone on too long to end with a simple "it's one of the seven suspects" finale. I think Jane is insane, i think he has a multiple personality disorder that means he is Red John but at the same time he honestly doesen't know who red john is. As for the fact that Martins said he shook red John's hand and the fact that Red Johns accomplices never recognize him as being red John those are easily surmountable pieces of evidence that point against him. How does Red John know about his childhood memories? How does Red John always stay one step ahead of him? Its simple, Red John lives in Jane's subconscious. However there is one thing that leads me to be contrary to this belief and that is with regards to my suspicions related to lisbon. The fact that at the begninning othe season finale she is asked what happen to her hand and no answers are given was dropped in by the writers on purpose. However as with jane there is the whole thing regarding the handshake. I have a very strong feeling that that was just a huge red-herring dropped by the writers in order to fool unwitting spectators.