Ok, well if you look at the scene where the gun shot happens the light comes the window on the left, where Ray was sitting, not from the right window where Patrick would have been. So I believe that Patrick didn't shoot anyone at the end of the episode. 

I also believe that RJ is separate from Tyger Tyger and that Tyger is being used to throw us off the scent of the real RJ, which is Haffner. He fits the descriptions given previously and so I'm sticking with him for now. 

I personally have two suspects which would fit my profile of Red John.

Brett Partridge: They said there is something special about Partridge his death and I like to believe he returns. The Theory that Stiles is his father might be true, maybe Patrick really wants to kidnap Stiles to get Partridge out of hiding (Because obviously Patrick knows already who Red John is, he is just playing his games). Saw the promo for a Criminal Minds episode coming out soon? Look who it is and the voice is similar to Red John. We all know the other clues that lead to Partridge, so I won't list all of them now.

Here the video of 'Red John' on Criminal Minds: http://www.youtube.com/watch?v=XGbq8LuACeg&feature=youtu.be

Maybe Heller wants us to believe it is Partridge, in that case here is my second suspect: 

Ray Haffner: (In case he didn't die now) 
He was my suspect from the very start and I still hold onto it. When they gathered all the suspects together, he was the only one asking Lisbon to drop the Red John Case after, why would he want that? Because either he is involved or he is Red John himself. He is involved into Visualise as well and stuff.

BESIDES

The other three are involved into Tyger Tyger, which will go on when the Red John case is done. The woman last week was killed by one of those three or another memeber of Tyger Tyger. It was never Red John who bugged their office, it was the organisation. The murder was unlike Red John anyway. 

Let me know what you think

feeling sorry for those who missed ep06..

                                      s06e06 Fire and Brimstone

Patrick Jane with the final tattoo clue rounds up the 5 suspects in Jane's Residence in an endeavor to reveal the secret identity of RED JOHN..
....

TO WATCH ONLINE S06E06 click ;                                                                                  http://www.free-tv-video-online.me/internet/the_mentalist/season_6.html

For some time i have been entertaining the idea that RJ is more than 1 person.(maybe a duoor trio)..

ok putting this line of thought on hold let me contemplate on the recent events of s06e06 fire and brimstone.
      
      * Why did RJ hire an amateur detective to spy, 
      * Was the tattoo clue a clever ploy to misdirect jane , i mean did RJ purposely reveal the tattoo to the hired detective so she cud feed false information to Jane while dying
      * Also interesting is the fact that out of the last 5 suspects, 3 have the same tattoo while stiles and haffner dont, both of which r Visualise members and we all know that RJ was a VISUALISE member, so was it a clever planning on behalf of Haffner/Stiles or both.

At the end all i cud say is that clues and direction of events can be changed ata any point of time suiting the anticipation of the audience, rating, storyline or as the need arises...    

Bruno Heller said there would be a big clue in the premiere episode, "Desert Rose".  Here is my thought. When Red John paints Lisbon's face with a smiley, there is something off about the smiley. Normally, the eyes are almost horizontal on every Red John smiley, but on Lisbon, the eyes are vertical.  In "Fire and Brimstone", Stiles paints one of his lady followers' face with vertical lines of blood across her eyes.  To me, that seals the deal.  RJ has witnessed a ceremony like this before and is copying the ritual on Lisbon. Haffner is a disciple of Stiles and would have seen one of his rituals.  Also, this ritual was about rebirth.  Haffner didn't want to hurt or kill Lisbon, so he performed this rebirth ritual on her.

I think the tattoos are a red herring.  This "tyger, tyger" organization may have nothing to do with Red John at all.  Or, they may be his followers, but why would the leader of such an organization wear such a mark?  I don't think it would be necessary or very smart to give himself such a mark.  Better to leave no trace of association.   

There are two option now: RJ is in TT brotherhood or he isn't.
If RJ is in TT organization, sheriff  McAllister is best fitted as a suspect. Even the writing on wall "He is mar" could came from "He is marshal". He is of the right age, weight, posture etc.
If RJ isn't form TT organization, then only Haffner remain. Stiles said once to Patrick he knows more then he (Patrick) or RJ could imagine, so he spoke about RJ as a third person.
My bet remains on Haffner.

PS: "Fire and Brimstone" has been the worst episode of the mentalist till now.  Nothing happened for real in it besides Patrick gathering the suspects.

No theory here. Just wanted to share my opinion that the show has been extended far long to reveal red john. I think Bruno has made a mess of his storyline himself, especially with bringing up the 'Tyger tyger' organization all of a sudden in the 6th season (So as to keep the show going on after RJ is killed/arrested ---> $$$MONEY$$$ )

Its a fact people - whatever clues we are given, nothing is concrete. Whatever theories we come up with, Bruno can change Red John at any point of time. Its all about timing, expectation of the audience, and of course MONEY.