In this theory I would just like to point out possible crucial clues that could help with identifying RJ


-In the extended promo I couldn't help but notice something. Something everyone was talking about in the beginning of Season 6 ... Yeah that's right = PIGEONS!!! 
-If you pause at the 10th second you would see Thomas McAllister smashing through the glass so that means he's in the next episode. 
-Sophie Miller said Red John was an excellent whistler. In Episode 7 we can see CBI Ron whistling