PJ knew someone was trying to find out about his stuff so he left FAKE material.  

Kirkland obviously was behind it and got a fake list and in 06x04, he is going to find out his list is fake and he is pissed.

Someone else had earlier specified that Kirkland was trying to find Red John himself and the torture threat of PJ makes me think that he lost someone to Red John and is intent on killing RJ himself.  So he is torturing PJ to get the real list.

Bruno Heller has confirmed that RJ is on the list of seven so now it seems that it's not Partridge or Kirkland.  I wouldn't be surprised to see Red John save Patrick from Kirkland.

My best guess is that RJ is Reede Smith, but that's based on the earlier theory by someone else:

http://www.whoisredjohn.com/See-a-theory-Red-John/5578

My main point was that I don't think it's Kirkland based on what we just saw.