This is why I don't think Red John could be Bob Kirkland. It's very simple really; before Red John killed Lorelei, he already knew the 7 names Jane had narrowed down - this goes without a doubt, or else how did he make the video? Bob Kirkland and his team broke into Jane's aerie to collect what information he had on Red John after Lorelei's death; if Kirkland is Red John, what would be the use in breaking in and seeing what Jane knows if Kirkland already knew the 7 suspects?

Someone else here mentioned that Sheriff McAllister couldn't be Red John because he would have known that Van Pelt worked in CBI when he approached her in S1E2. So obviously Jane's list is bullshit. So who wouldn't know that his list is bull? That's gotta be Red John.

Since Patrick Jane already knew he was being watched ,why would he give his observers real information if he could just trick them.

I think the list of 7 is fake.

Jane knows who is Red John, because the happy memory was in fact a trap ,Jane gave to each of his suspects different information about childhood memory's, all well disguised, and RJ revealed himself by killing the girl. Jane tricked him because he knew Red John wouldn't resist such opportunity.
 

This is not a theory but more of an observation. Based on PJ recollection, we can see that he enters his home but there is not sign of broken entry. In fact in his memory, he only discovers his wife and child dead body once he enters the room.
Would this be a clue that his wife might have known RJ or that it would be someone she would trust(Law enforcement officer) to let that person in. Also it would be explain that RJ knows about the childhood memory if it were someone she knew but not so much a a law enforcement officer.  Was it ever explained how RJ entered PJ's home? 
Let me know what you think.

It could really be anyone which is the infuriating/addictive thing.  of the 7 on the list Ray Haffner ticks the most boxes for me

-similar to Harkers description
-member of visualize and right age to draw the face on the barn
-connected with Stiles as above
-he  is introduced as making his career off surveilance cases. Think the wire tap in the girls room at the end of the first series. Red John constantly seems to be a step ahead. Surveillance skills would surely help here
-was a member of the FBI and CBI

There are other guys i would say are right up there. Ellis Mars is one. Minelli another and Sheriff McAllisters inclusion on the list puzzles and intrigues me. If i had to pick one person i would say its Mars. If the list is right, Haffner.

Just a theory but I think we can eliminate Bob Kirkland from the suspect list.
Why? Well first because it would be too obvious, i mean, Bruno Heller clearly wants us to see him as a suspect and it would be way too easy.
And the second thing is related to the "killing in the hospital" part. It doesn't fit RJ MO, I mean, killing like this is almost too soft for RJ (remember when he killed loreleil, it was supposed to be a "soft murder" because he liked her).
And here, Bob Kirkland just kills in the hospital, with people around and no blood, it does not look like Red John at all.

Let me know what you think about it!

I don`t understand. Why is Sheriff McAllister a suspect? I don`t say he couldn`t be Red John, but I don`t know what made Jane think that McAllister could be RJ. He appears in an episode which has nothing to do with Red John and, yes, he has  weird behavior. His attitude with Van Pelt made us all believe that he could be the killer (who murdered that girl from the 2nd episode), but I think no one found any link between him and RJ.
I mean, if he is RJ, he most certainly does know that Van Pelt works with the CBI. The whole scene on that road when his harrases Van Pelt would make no sense, since he knows very well that she and Rigsby are part of Jane`s team. So which could be the link?
What made Jane put him on the list? This isn`t a random choice, that`s obvious, but I just can`t see the reason.