Well. I've had this theory since the first time I saw this guy on the show. Red John is described as a narcicistic guy, with big influences and power, and the hability to own other peoples mind, just like Patrick maybe, he must have some kind of special charisma, enough to make people kill for him, and even commit suicide!. That guy is Bret Stiles, he certainly is a a big leader, he knew where to find Kristina Frye, and besides, he is portryed by Malcom MacDowell, a tremendous actor, I've always thought it was suspicious that an actor like him has a role in the series, that role might not be a small one. In the psychiatric tape, she described hi as a middle-aged person, but what if he sent someone, like Haffner, to spy on her? About Brett Partridge, I've always thought on him as a distraction from Bruno Heller, because since the first season, some people think that he is RJ... But don't remember to have seen another TV series nor a movie, with 2 characters with the same name, so maybe actually there ir something on him. But btw, I vote on Stiles for this one :)