if you saw the episode when red john is telling the limerick or something like this. you will see that he is 5-10 cm taller than jane. its male. and i think its only one person. from s5 e13 we know that he was in visualize group or he was at farm warking i think he is one of the member, and i also think that bret stiles knows who is red john. i dont think that he is red john. there was a lot of theories and one of them was Jane. but he is not red john i'm 100% sure. cho isn't so tall as real red john. in group there is only one person rigsbey. and actually i dont think that red john is in FBI or CBI. im not 100% sure but i think bret pattridge also knows who is red john and maybe he is working on RD but he isnt RD. my opinion is that he is very close to him. i dont know who it is but there isn't many people shown in all 5 episodes who is 5-10 taller than jane. so someone must look every episode and see every male person who is 5-10 cm taller thank jane. if you interesting to discuss about red john. add me https://www.facebook.com/tato.kapanadze?ref=tn_tnmn

and i will try to discover something new.

sorry if i had some grammar mistakes.