All of the evidence I'm about to bring forward is making some assumptions on whether or not some things told are actually true or not, such as Rosalind Harker's description of Red John, the list itself, Brett Partridge being dead, Patrick's former psychiatrist's psychiatric analysis of Red John.
Also, I'm going to attempt to show why some people CAN'T be Red John according to the evidence provided so far.
I'm more interested in the smaller details rather than the big picture.
Brett Partridge - Can't be him since he's dead.
Brett Stiles - An interesting guy, but I don't think it's him because I believe he's a bit TOO old to be Red John, and I think Rosalind would have said something about it (assuming her testimony is true).
Also, notice that he has people around him a lot of times and has things done FOR him. He's not the type of guy who likes to get his hands dirty like Red John does. This may also take him out as a suspect since Red John allegedly has strong hands ... Tough to do for an older guy who has henchmen doing his dirty work.
And I doubt he's very good with a gun, seeing that Red John is quite a crack shot in the episode where he saves Patrick from demise.
Ray Haffner - A member of visualize and a promising suspect for sure. According to Harker's description, Red John is neither muscular nor soft. However, near the end of episode 2 of season 6, it's shown that Haffner does indeed work out. So he may indeed have strong hands, but that would also make him somewhat muscular. At least noticeable enough for Harker, I'd think.
Reede Smith - A bit on the "softer" side, wouldn't you all agree? Red John didn't seem that big of a guy when saving Patrick. Possibly an accomplice or just wanting to know how much Jane knows since Red John seems to be a hot topic for the FBI and CBI(implied in episode 2 of season 6).
Gale Bertram - Another possible accomplice of Red John (implied in episode 2 of season 6). However, he's too tall and doesn't have enough hair according to Rosalind's description.
I think he's just a red herring. Red John obviously enjoys attention, but not so much attention where it may give himself away. He could have just hired Bertram to keep an eye on things in the CBI. He is a director, not an actual agent. He doesn't get his hands dirty. He just keeps an eye on things.
Remember Rebecca Anderson before she was killed? Another informant of Red John. Red John likes to keep tabs on things, but he may not necessarily want to be that out in the open. He likes to stay in the shadows.
Robert Kirkland - A mysterious guy who works for the Department of Homeland Security. Not too much is known about this guy, which makes him a compelling suspect. But I think there are a few clues which may show that he is not Red John, but an accomplice.
Just before he killed Jason Lennon (a former accomplice of Red John), he asked Lennon if he recognized his face. Lennon said no. I think this implies that Kirkland can't be Red John, because I would assume that Red John and his high self-regard would at least want his followers to know what he looks like. Rebecca Anderson was gleaming with joy when she saw Red John just before he killed her, so that means he does show his face to his followers.
Also, all Red John killings before and after never showed the face of Red John ... I don't think the show would change that for this one killing.
Thomas McAllister
- Probably everyone's last pick ... But my number 1.
There are few small but incriminating clues, in my opinion, which strongly suggest that Thomas McAllister is Red John. He's also another character who's not too well-known about, which makes him a prime suspect, since other characters with more background have more evidence to show that they are not Red John.
1. He pretty much fits the description that Harker gave: Not muscular but not soft, strong hands (he is a sherriff and a country guy), not too tall and not too short.
2. HIS GAIT (this is my personal favorite bit of evidence incriminating McAllister): Go back to the episode "His Red Right Hand" and notice how Red John walks toward Rebecca Anderson. Look at his left arm and how freely and highly it whips when he's walking while his right arm stays fairly stationary. Now look at episode 2 of season 6 near the end when it shows McAllister walking back to his car. Possibly the exact same gait as Red John before he killed Rebecca Anderson. Red John is so used to the gait that he normally uses as sheriff, that he didn't even think twice to change it up before killing Rebecca.
3. His left hand: Also near the end of episode 2 of season 6, one would notice that McAllister's left hand is a bit strange. He either keeps his ring finger excessively curled out of habit or it's just like that.
Now go back to the scene where Red John is drinking tea while Rosalind Harker calls Patrick (season 4 episode 13, "Red is the New Black") and look at Red John's left hand while holding the teacup. It also looks a bit strange, as if a finger is being held from view and curled away somewhere.
4. He's on the list. Everyone on the list has a reason for being on it, not just because Patrick deduced it, but because the show has something in store for all the characters on the list.
5. He's definitely old enough.
6. He seems to have the least amount of suspicion floating around him, and he apparently has the least amount of power regarding the final 6 suspects, seeing that he is only a sheriff. Having a fairly low-profile job while still having some sense of authority is something that Red John would like.