According to my theory http://www.whoisredjohn.com/See-a-theory-Red-John/12120 
McAllister is Red John. Just because I saw the promo and some clues from episode 7.

I'm going to reduce the 7 suspects list to 2 names.
 
Being more rational now, are we really accusing McAllister of being RJ just because of the promo?
This is the most stupid thing we could do. Furthermore, we can assume McAllister ISN'T Red John. Bruno Heller would never show us the serial killer in a 19 seconds promo.

Then we have:
-Brett Partridge - supposed dead in episode 1, they don't mention him anymore until episode 7, no one can say he's dead for sure (not even you, Partridge haters).
-Bob Kirkland - dead. 6-7 shots in the back. Unless he's immortal, he's dead.
-Gail Bertram - Jane declares he's Red John, but it doesn't take a mentalist to know that he's not Red John, given all the clues and after episode 7 (And Jane is sure he isn't).
-Thomas McAllister, if they showed who is Red John in the promo, then I'm Britney Spears. I've already said why he isn't-
-Bret Stiles - supposed dead, anyway too old to be Red John. They MUST show us what really happened in the house.
-Ray Haffner - supposed dead (but I think he's not). Again, they still have to show us what really happened in the house.
 

So, this is pretty cool, because all of the Ray Haffner fans who used to say "Partridge is dead, get over it"  have to admit that their favorite suspect might have faked his death too.

Someone between Partridge and Haffner is Red John. And whoever he is, he faked his death.

All in all, I'm asking this again. What's the meaning of Partridge's burned shoulder? They promised to explain his death, but they didn't. Why didn't just Cho look at the face? As episode 7 taught us, Black Association can edit any data report, and for a forensic guy it wouldn't be hard to do that.