At first i think that Brett Patridge is red john and it would make the best one.
-In all episodes which he appears it is obvious that he does not get along with patrick and if you remember lorelei said and i quote ''i only wonder why the two of you did not become lifelong friends the moment you shook hands'' which is a little hint in my opinion that they did not get along too.And all the other facts that we have all heard.
-I changed my opinion about sheriff mcallister because i just finished the first episode for the second time and in the place where red john supposedly killed patridge and captured lisbon were pidgeons which as we know sheriff fears them. (I know,not a strong arguement).
-Brett Stiles has all the wrong physical requirements.
-Gale Bertram is a good option but i do not think that he is clever enough to be red john and after seeing episode 7 i am convinced that he is a red herring.
-Reed Smith not a chance after seeing episode 7 for obvious reasons.
-Ray Haffner i can not disclaim him because he is a good option,but i think from the storyline they wanted him to be too obvious like learning from Season 5 that he was a member of Visualise.One of the hints.In my opinion,just a red herring.
-Bob Kirkland i am pretty sure that hi is dead.But i can not argue with the idea that his twin is red john.I read a lot of theories for michael and i find them interesting.
Nevertheless,as i said in the beginning i believe red john is Brett Pattridge because he fits the criteria and to be honest i like the character too much when he is in the same place with Patrick disagreeing all the time and showing us that he is a little afraid of him,but in his eyes you can see a well hidden anger.Wonderfully written character for being a suspect and wonderfully played by the actor!!