I think that RJ is Walter. I'm agree whit the reasons that the reader "mashburn23" explain, this was his message ""Firstly is obvious
that Red John is a powerfull and well connected man. We can see this
because he can afford a limo and also several resources, such as software to
spy on CBI and to hack there network. Besides when RJ kills his copycats we can
see his wearing a suit and good shoes(killing the copycats wasnt a planed kill
so he must likely went to kill them with what he was wearing in his
normal life). So i will assume that he is rich, I will consider him a
well sucefull business man. He is also very persuasive, and bored with his
life, needs excitement (if u check mashburn's episodes you can see that he fits
the profile, and for some reason in one of his episodes a lot of ppl are
wearing red clothes). On the first season it was wrote on the
wall "he is Ma", which could be " he is Mashburn". And
Finally We know that patrick Jane meet RJ already. This is my opinion, sry for some grammatical errors"
I want to add, if, finnally, Walter is RJ, it will be very exciting because lisbon was in love with him!! In addition, RJ knows that the best way to damage Jane is attacking his family, and, now, Lisbon is the person most important in his life!
