I have been posting/commenting for Ray Haffner as that is my pick for RJ however....I have just had a thought based on the comment from the tv guide article that reads: We now know that Red John has a burning desire to befriend Patrick. He wants to be friends with him so badly that he's willing to expose himself and put himself out in the open for Patrick. 

The only person that comes to mind that would want this kind of acceptance from Patrick would be Partridge. I realised he is dead but think about all the times Patrick has mocked him, ridiculed him, etc. He is the only one that would be yearning for Patrick to be his friend, to accept him. Even the way he asked Patrick what was wrong, etc in the first episode of this season.