Kirkland. Just fit to me. I'll tell you why.

Kirkland always act like he has some.. I would call 'mind issues', he acts strange sometimes, like trying to understand something, very tense and nervous sometimes.

After Lorelei and Jane's kidnapping thing went off of news, he practically vanished.. Then he went through all people's name that Jane has shaken hands with and got a step ahead of him.

He 'stole' Patrick's board to assure that he was a step ahead and he could easily have gotten the happy memory from Brett Stiles (That'd be my kick, for getting his memory, when Patrick was in asylum, maybe) to hurt Patrick.

'I bet you think you're pretty damn clever'. (s05e22 - 42:37m)
The 'damn' for me, looks like a sign of angry (Like a said, Kirkland showed some signs of unquiet) because Jane has gotten closer too much and faster than he thought Jane could be, and that's not good, although RJ said that he's going to kill again, often till one catch another because I think Jane can identify RJ very soon if RJ doesnt do anything to track Jane off. And that means (or should mean) Season 06 will be the finale.

But seeing Brett Partridge very calm when Jane arrives, is very strange either.

Btw, "RJ has powers.", just reminds me Brett Stiles. The guts to do the killing, Partridge maybe. Get away with police issues, Kirkland and Bertram. The other ones I dont mind.