I think its Ray Haffner based on jane psychiatrists description . I think he didn't kill Teresa Lisbon because he is in love with her. The psychiatrists said that the person is a good whistler when Ray left Lisbon room he was whistling she also said he was narcissistic and Ray seem cocky when talking to Lisbon. I think the whole scared of height is a red herring i don't the person fear of height maybe fear of high objects or fear of flying hmmm.
http://thementalist.wikia.com/wiki/Red_John
"Jane compared him (RJ) with Elvis Presley in terms of popularity and followers."
Ron' hair look like Elvis!
I've rewatched the episode 3 times now, ignoring the obvious clues/red herrings (fear of birds, middle aged, good posture, able to creep silently), and that one moment on top of the church, just before he extends his arm to PJ says a lot to me. In a body language sense, i read that he feels totally in control, almost as if he's sending a message to PJ, saying "I don't have to rescue you, i can kill you at any moment, but why spoil our game?"
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I really dont know if i believe in this.
But as you might know William Blake has made painting called a brace of partridge.
We have also seen a lot of pidgeons in the last episodes. The painting is two dead birds.
painting: http://www.1st-art-gallery.com/William-Blake/A-Brace-Of-Partridge.html
I might be wrong, but its a weird coincidence, if it doesnt have anything to do with Red John.
I know partridge might be dead, and i also think it would be weird if he isn't.
Tom say to PJ
"hunter everything that has a face"
It seems that there are many people to know the face of Red John. It makes me always uncomfortable about him being only one person. Even one of them betrays him, PJ will know the real name of RJ. Every disciple know RJ different than the other disciples? I don't like the idea of being RJ more than one people but there could be one person who unites and controls them. But he does not have to be the one who killed PJ's family. Timothy Carter was the one who murdered them but at the end there is only one person they answer. Could be Brett Stiles.
In the middle of the episoude S06E03 McAllister arrives with jane and lisbon at the "bella-vista" and he doesn't want to go there, maybe afraid of highs? NO.
When they arrive you can lister the sound of birds, so he starts looking to everywhere as you can see. He is indeed unconfortable there, then he left.
I dont believe that McAllister. But somehow he doesn't like birds.
That the reason he killed "Partidge" first haha