I removed MsAllister from the list as he said I'm not Red John!!! cannot be this weak if he is

Ray touched the exact location of the tattoo when showing that he doesn't have it !!! I guess he knew about it or he had it for sometime

The actor said he was shocked when he knew he is Red John !!! I assumed he was playing the role since the beginning to avoid contradictions later

(this will remove many clues to be realistic such as the voice, the walk and the shape) .. then WHO WAS PLAYING RED JOHN???