I think Red John is probably Brett Stiles...

But I did notice something that points to Ray Haffner earlier this season. 

When Lisbon is captured by Red John, he paints blood on her face and 
releases her. 

This seemed quite odd and Patrick mentioned he didn't exactly know why this happened. 

It seems that Ray Haffner has a bit of a thing for Lisbon, so maybe that's why he
couldn't kill her or keep her hostage. 

It seemed too good an opportunity for Red John to torture Patrick because he 
undoubtably knows how important Lisbon is to him.

The only thing I can think of that would make his pass up this opportunity is if
Lisbon was too important to him to do anything. 

Either that, or RJ just wanted to toy with Lisbon given the phone tracking situation. 

Out of the 5 remaining though, I really think it's either Ray Haffner or Brett Stiles. 

The reasons for ruling out the other 3...

1. Reede Smith - He so freely let Patrick go and talk to Kirkland after Kirkland was caught, 
even though he was planning to kill Kirkland to keep him quiet. 

If he was RJ he wouldn't want them sharing information. 

Also, Reede doesn't seem to fit the "genius criminal" profile. He seems more of the brute
force type. 

2. Sherriff McAllister - Well he saved Patrick's life for one. I guess he could be RJ, but out of the
suspects, there seems to be the least amount of evidence pointing to him. Not enough evidence to
rule him out either, but as a gut feeling I don't think it's him. 

3. Bertram - The moment that really struck me was when Reede Smith kind of pulled rank on him
in the meeting with those two and McAllister. 

It made me think he's in the ring of corrupt law enforcers, possibly working for Red John. But a lower
member. I can't imagine Reede talking down to Bertram like that if he knew he was Red John. 

So my two main suspects. 

1. Brett Stiles - He has the resources. He has a darkness about him. The fact he has his own religion 
may point to needing to go to dark measures to experience life right on the edge. 

He's the only one of the suspects who is obviously a match for Patrick in his intelligence and ability 
to manipulate. Lorelii mentioned that RJ and Patrick were alike in the way they manipulated, so 
either one of the other suspects are hiding this trait, or it's Stiles. 

And out of the suspects he's also the only one who has shown the desire to help people if only they will 
follow him and give him undying loyalty (His disciples and in that scene with Grace when he offered to mentor her) 

2. Ray Haffner - he's my dark horse. He clearly has feelings for Lisbon. This may be why she wasn't killed
in episode 1 of this season. He also seems like he could be very intelligent. He doesn't give that away
one way or the other, whereas the suspects I've ruled out seem more like what you see is what you get. 

Whoever RJ turns out to be, it will be an exciting conclusion to the story!