This is not a theory but rather a set of questions and remarks from the latest episodes:

1- Have you all noticed how the physique of Bret Partridge changed over the seasons? in season one he looked odd and a bit geeky. In season five finale he looked more charismatic, handsome and...confident

2- Regarding PJ's sweet childhood memory. He said that no one knows about it. But I think someone does: His shrink. The one who treated him right after the death of his wife and daughter. When a psychologist treats someone, they usually ask the patient to talk about old memories and their childhood so it is very likely that Jane mentioned it during his treatment. So I think if PJ wants more clues as of who is RJ,he should go talk to his ex shrink.

3- It is weird how in the season finale he left the woman alone in the police car without any special security, knowing that RJ accomplices have suicidal tendencies.

4- It is weird how PJ broke the CD. I would have expected him to analyze it for two reasons: 
  - Lorelei was somehow in love with him and maybe she used a particular word or sentence that can be a clue as of who is RJ   
 - Technical analysis with zooming on the image and amplification of background sounds to try to find out where is this sort of warehouse located

5- Lisbon's hand scratch. Why is it mentioned on a season finale? is Lisbon somehow involved? I would rather think that she is involved in a different story, maybe a personal one, but not regarding Red John

6- Why didn't PJ immediately dismiss Bret Styles? He is now very famous and the head of visualize. So if the priest were to describe him (red barn), he wouldn't have said 'some kid', he would have referred to him as 'the now head of the cult who was just a member back then'.

7- Lorelei said she will have to die because she told PJ that she and RJ shook hands. BUT
:- How did RJ know that she told PJ?
- wouldnt it be more logical if she had to die because she was seeking revenge for her sister Miranda?

Please be easy on me and all your thoughts and comments are welcome:)