The Mentalist 6x8 - Red John - Sheriff Thomas McAllister is Red John

http://www.youtube.com/watch?v=EsnqP1PummY 

2:15 minute

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Patrick Jane  vs Sheriff Thomas McAllister (Red John) - Death scene -

http://youtu.be/KAqBO4Hx16I

13:12 minute

#GoodByeRedJohn