something that bothers me is when jane find out that someone enter in his "office" (the lirlkand mens) he wasn't angry or worry he smile.
well it dosnt matter now becouse it was before patrick finish the list 
my theory about who might rj be is that not ether  bret stiles (he is old and dont have the  physical fitness) or bertram(he dosnt match with the description of rj girlfriend) are red john. however i think that  both are accomplices of red john.
now that i remember agent smith from the fbi is not red john becouse of the rj girlfriend description