I don't know if McAllister is Red John. I continue to ask myself why Patrick says:"you're Red John. I have to say i'm little DISAPPOINTED"(Patrick though that red john was another character of the list?). And than...why the scheriff says, on the end: "I'll tell you how i got the names on your list...i know because i really have sensitive skills". What means? Scheriff!!! you're dying!!! why dont' you try to confuse or hypnotize Patrick ? Why you accept in a passive way your dead and instead you say "i know because i really have sensitive skills" ? I have the impression the scheriff(Red John, throught the scheriff) want to take to Patrick the information that the real Red John(Styles?)have the sensitive power, because this sentence have no sense in that context (Patrick not wants  to know how you have g the names but wants to kill you! So you have to defend your life, you have to try, being a mastermind, to mislead Patrick by all means or powers!!!)). The end of Red John was too "passive and poor". No signal of mastermind, but a message...