1 . BP is dead ... 
2. when lisbon entered in the room where patridge was found ... the door was closed ... but after he died someone was behind her and the door was open ...  you cannot say was patridge ... like some teories i read here ... 
3. Red John was painting Lisbon face with his right hand ! 
4. i think lisbon isn t dead ... 
 
My guess is that Kristina Frye is behind RedJohn ...he is only the killer (this is only a suposition ) ... think abaut that ... and then look at the last scene and try to watch again but no where the writer what you to look ... because this is the trick !