I believe that Patrick Jane, C.B.I. Consultant is Red John. It makes perfect sense! If you listen to Red John on the phone, it sounds like a distorted version of Simon Baker's voice. He is under 6 feet and he could have multiple personality disorder. When he is "sleeping" he is sub-consiously "sleep-killing" as Red John, causing him to feel like he has been up all night (insomnia). He most likely didnt know this was happening and he still currently doesnt know. One day he will marry Teresa Lisbon and sunconsiously kill her. (Prediction)