I'm allmost sure that he is (Kirkland). Here is why I think he is.
As many of you already may think, I think also that Patrick is playing a con on RJ with the list of the seven names. And also the "happy memory" thing, the only thing that could make sense I believe is that Jane tricked RJ to believe that, Jane knows how the reading works, so he could have make him believe that (I really don't know how exactly). Besides that a guy who uses a memory palace WOULD NEVER use such a extensive display of information supossed to be confidential, that's why when his investigation room was compromised he smiled, he wanted it to happen to make RJ think he is one step ahead.
The list that Jane gave to RJ is phony characters + Real RJ, because if he is not there he would notice that somethings off, he knows that Jane would never discard the real one.
The most surprising thing is that wether Lisbon is with RJ or Jane is fooling Lisbon on purpose, he told her that was a happy memory (and acording to this theory, he made up the theory for RJ, why would he tell her that?). THE F*ING INJURE ON LISBON HAND where did that come from? Why he doesn't ask much about it (maybe because he knows something that we don't). Why would Jane act so frustrated to Lisbon (only the two of them were in the room) when he shows her the video of Lorelei. That makes me think that he needs to fool Lisbon, but WHY?? Is she the RJ informant or Jane just wants to keep her in the dark? Craig O'Laughlin did not shot her in a vital spot.
So, narrowing the names :
Sheriff McAllister and Reed are just fillers.
Brett Partridge is just FanService.
Kirkland, Brett Stiles, Ray Haffner and Gale Bertram are the real tough list.
Haffner doesn't look like the guy who could manipulate someone and neither a group.
Bertram is so full of himself and commits various childish mistakes, I don't think he is either.
So is wether Brett Stiles or Kirkland
Pro Brett : He fits too damn well the profile.
BUT
Why would Lorelei say "it was a wonder you two didn't became best friends when you shook hands" because SHE knows they aren't friends so discard Brett Stiles, because it seems both of them are having fun with eachother so that's why I (in my opinion) think of them as play buddys.
So I think it has to be Kirkland.
