I saw a post on here earlier that red john is left handed . I find that hard to believe because in the season 2 finale when RJ meets PJ for the first time he shoots the guy about to stab PJ with the gun in his right hand and when he walks down he cuts the girls throat with his right hand also. Also in Season 1 Episode 1 Partridge was doing his RJ walk through for the team and said that theres the red john smile drawn clockwise with three fingers of his right hand . I know in one of the episodes RJ has tea or coffee being held in his left hand and in s6e1 premiere at end he is holding the blade with his left hand but I believe its more telling that he wiped the blood with his right hand then it was him holding it in his left .

I would love to hear anyones take , feel free to comment