I don't know but will be interesting if Rigsby was Red John as will be quite dull if was Haffner, 

Brett Partridge is hiding red tiger in his name. Is that a clue? 

Will be interesting if it is him , definitely is not Patrick or Lisbon .

Hoping for a good twist, happy if is the wicked twin.

So I guess 1.- Partridge 2.- Rigsby. 

I want to find some more codes !!!