'Partridge-is-dead' believers, can you please explain the burnt left shoulder of the corpse?

Why the hell Bruno is stretching partridge so long (till the Red John showdown), if he is dead??

Definately, even if partridge is not redjohn, he has something bigger role to play in S06E08....

I also have one observation:

Till the end of S06E06, Patrick didn't know anything about Tyger Tyger (as he was surprised to see three suspects having the tatto)...
Suddenly, in S06E07, he realizes there is a secret evil organisation in law enforcement. 

My guess: Something that must have been happened at the house where patrick calls in all suspects and which may be revealed in next episode...Still I am not sure...

Please explain this...