Just thought I would share my theory after re-watching Season 3 Episode 3. This episode works around visualize, and at one stage Patrick falls asleep in one of the visualize rooms. When he wakes up he finds a fortune cookie which contains the message "A friend is in danger and needs your help". Although the writers want us to believe that it is about Kristina Frye; what if it is a clue to Patrick's happy memory at the end of season 5. Maybe Patrick was hypnotized and who ever Red John is left this message as a hint to what he would do later on.
This then leads me on to why I believe Red John is Bret Stiles. First of, once Bret find out that the killer in this episode is his lawyer Julius, he says "Please tell me you didn't kill that young women". he then presides to slap him. Could Brett have set this all up to get Patrick into visualize and interact with him more. In this episode O'Laughlin also fist appears for the first time and in the interrogation of Julius the lawyer asks him for his cooperation "with the FBI's investigation into visualize and Bret Stiles". As Julius is being moved to the police car a visualize member by the name of Heron shoots and kills Julius. Heron looks to focused and although could be just the adrenaline of shooting someone he could also have been hypnotized by Stiles to kill this man so not to tell anyone who Bret Stiles really is. Patrick and Stiles then have a one to one discussion where Patrick says "Your safe, bravo". In the video sent to Patrick in the last episode of season 5 allegedly by Red John it contained the word "Bravo", could it be a hint by Heller that Red John feels the end is near as it almost was for Bret Stiles in season 3.
I know Bret doesn't fit the profile described by Rosalind Harker but maybe this is a false clue, after all why leave someone who you were in close contact and can describe you to the authorities without trying to manipulate the investigation.
