The whole Red John thing will be an interesting discovery. Not too simple, but not too complicated.
First of all I want to say who is NOT Red John. And those are the three suspects with the dots. It's obvious they're all in something bad, maybe related to Red John, but they are not. Of that I am sure. They don't seem like the type of people.
Second I just want to mention all the things that have caught my attention through the series, things to consider to know who Red John is:
a) The famous "He is Mar". Maybe many, or even try to google Texe Marrs, he has something to do with the name of the next episode "The Great Red Dragon", which is a William Blake thing as well.
This is probably an interesting thing.
b) The pigeons for sure are a big clue.
c) I think all the phobias are just a way to distract the fans.
d) The thing with LaRoche is still hanging there, it was never clear.
e) What about Bob Kirkland? He is not done, at least not his twin brother.
d) I think the Tiger, Tiger password and the poem RJ says, there's obviously a connection.
f) When Teresa is at the Hospital, the nurse asks for some Chinese person, not a coincidence.
g) And most importantly, Bret Stiles, that ritual, there's of course something there.
h) Many other details that I have probably forgotten.
My take is that RJ was Bret Stiles, the one who killed Jane's family, or the voice at least. But I think RJ is some sort of symbolism. Bret Stiles is the leader, and a lot of people are connected.
