Red John (not me.... or is it?) is Brett Stiles and i know this because Brett is the only person that knows secret information about Patrick Jane which noone else knows, this implies that Brett Stiles has studied Jane or been in his house and the only time that Brett could be in Janes house would be to kill his wife and child. Brett Stiles is also a very powerful man meaning that he has the money so that he can cover his tracks by framing other people.