Guys the clue that Heller was talking about from the second episide is infact two clues. One was the hand red john used two hold the knife and the second obvious clue was the pigeons.
On episode 3 the sheriff used his left hand to help jane from falling and jane noticed that if you look closely and then there is the music in the background. And look how the sheriff reacted to the pigeon ......we also learn that he is much smarter than he puts out to be, look at the way he analysed the dead guy. Sheriff Thomas McAllister has been there since the beginning and yes he is definitely RedJohn as you will find out. His accomplices were Bret pattridge, Reede Smith, Gake Betram and Ray Haffner( who happens to ask Lisbon if he was tracking the seven suspects? ......