Well it's either Haffner like I mentioned a few weeks back, or will there will be a Twist? 
Perhaps Partridge didn't like the way Jane starred at him, at the beach? We know the Tyger Tyger organisation can perform cover ups and we all know Red John is rather theatrical... 

Perhaps one of his minions tasered Lisbon whilst he faked his own death? Never tested the blood on Lisbon's face to confirm it came from Partridge, as Jane wipes it off immediately...

Just my theory, either obvious Haffner as he meets both Rosalind and the dead shrink's descriptions, or a bit of a twist with Mr Partridge. (breTT, TT for Tyger Tyger? Letters in his surname can spell red)