Patrick Jane is not a Red John. Let me explain why. In last episode when they are on farm they see smiley face on the wall. They said it was painted by someone who worked on the farm. After that Jane meets all people who shouldve worked there and no one recognizes him. But there is my another opinion. It was there 25 years ago. jane is 44 which means he painted that face first time when he was 19. Age fits so there is a chance.