I am hoping that the episode I saw was just a "red herring" and not the real final episode.  Maybe RJ will turn out to be my other suspect, Haffner, or maybe still McAllister but with more questions answered and more believable acting.  In one of the episodes this season, when Haffner gets on the CBI elevator, the way he blocks the poster behind him, the letters that can be seen spell out "RED" but then maybe that was just a red herring or I was looking for a clue that really wasn't meant to be a clue and this was just a coincidence.  I just can't fathom that this was the way they ended Red John.  Too reminiscent of the final episode of Lost.