we can not identify red john by the physical descriptions it will be poor , the main fact that this show in some how is related to william blake...........in this 6 th season the episode 7 called The Great Red Dragon......and the 8 th one called Red John................( it 's kind an equation )the great red dragon has 7 heads , that match perfectly with the list of 7 suspectsso we can say that red john afterall is not individual , it 's a groupe......but it 's kind a weird ......... a groupe of such organisation ....so perhaps those are 7 heads , the 7 tools .......so who 's the one we are lokcing for...........to answer this question , at all implies a sight..it 's in the general idea of the show ...it 's isn't about jane it's about the mentalist .....and ther is no need to describe a mentalist....so from this point we can predict red jhon's identity to be ( charming , manipulator , tricky , powerfull, romentic ............) and i think those 7 or 6 persones they may have some of this descriptions but whose the one who have its all.........a person could trick even jane ...i blieve red john is Walter Mashburn................( sorry for bad english)