In 1x02 episode, sheriff looks pretty interested in Patrick's appearance, immediately starts asking questions about him- somehow, being suprised. He is like: ''You?! What the hell are you doing here?''. If Tom is really Red John, that's the kind of reaction you would expect from him- he remembers Patrick only as someone who mocked him through public television, false psych from whom he took his family away, as a punishment. And now, suddenly, he is here again, helping CBI! The game of rock-paper-scissors finally triggered rivalry between the two of them.

- not a theory but just wondering the last few killing by Red John Have been wierd first thing you supposed to see is the smiley face draw in blood. i cant really say i have seen any of that so far.

- in S06X05 Jason Cooper thanks Jane and Lisbon and explains that Haffner could'nt be there, and that he works for other clients besides
visualise, i dont think Red John killed her, her throat doesnt seem to slit plus lets think back he users a Tazer, and normally he ties there hands up plus where on earth is the smiley face drawn in the victims blood?

- Jane is aware its not Visualise so he automatically thinks its Red John, it could be the "Tiger Tiger" Group or maybe someone working for Red John, I dont think its Red John Himself that killer the women in that episode.

Just some of my thoughts. :)

Just to point out something , we all know how bruno loves anagrams and stuff , we all know theres something fishy about mcallister.. the way he tried hitting on van pelt , as you all know there are 7 deadly sins , one of them is LUST , the way of death for the person commiting this sin is to be burned with fire and brimstone , now couldcallister be a rapist or something , I have nooo idea haha anyways let me know what you guys think :))

Maybe this isnt important but its worth to mention it.The only one from the suspects that calls PJ with his name and not surname is McCallister.I take this as a sign from Bruno Heller and also the fact that in s06e02 Sherrif wanted from PJ to call him Tom.

****SPOILER ALERT****  This photo was leaked from Ep. 6, "FIre and Brimstone."

https://twitter.com/Aleee_O/status/396405515699249152/photo/1

I found this on an IMDB message board. Somebody tweeted this photo, which is from the upcoming episode of The Mentalist. It shows Jane and several of the suspects, one of whom has his shirt off, and apparently NO tattoo. 

http://i.imgur.com/agLWD6c.png
This website was a big clue to begin with!

Its Sheriff Mcallister. His disciple was Sherriff Hardy yes a sheriff, nice nod by Heller,the biggest clue was in S1 how did this elude me!