I am not contributing a theory, so sorry about that.
I want to ask something. At some point in this last episode, Lisbon tells Jane that Brett Stiles is missing since Lorelei's death. Then how did they bug him in episode 1 along with all the other suspects? Probably I missed something obvious.
This is actually my favorite show ever along with House M.D. I wish that the writers will finish it greatly. I want to feel emotions as intense as Season's 3 finale, greatest episode ever.
I accuse Partridge because I think he is the best candidate to be a great Red John. He actually reminds me of the character of Kevin Spacey in 7, so I guess that's enough for him to be the perfect Red John.