I believe that we've known who Red John is for quite some time
now. I think that Jane has a very strong theory that he doesn't want to
believe...I say this because whoever Red John is could very well be
someone from Jane's past, Perhaps his Father? Jane's Father encouraged
Jane do trick people while they were apart of the Circus, although Jane
did not feel comfortable doing so with the tricks of physic powers. But,
Jane ends up doing that very thing for a living, fooling and tricking
people for a financial gain, I believe that Jane's Father was upset
about this and saw Jane as a Hypocrite. Jane's Father has sought out to
teach his son a lesson. At first I thought Jane was Red John, how Epic
would that be, huh? Jane himself sets up all these Murders and has
accomplishes that only very few know who he really is. Perhaps Jane is a
psychopath and will ultimately lead the CBI team directly to him and
have them not believing what they see or what all the evidence is
pointing to. BUT, that is just a wild theory that I had in the very
beginning, LOL! I really think it's Jane's Father and the Finale of
Season 5 taking Jane back to his past really makes me think its Jane's
Father, who else would know about Jane's childhood secret and use it to
hurt him?