This is a machine translation, sorry.

Brett Partridge is Red John. he fake death. It's a trick.
That it does not kill the Lisbon is misdirection to Jane.
It hid the fake death.
Why not investigating the case of Partridge? Because, there is a truth that can not put out there now.

Future.
Jane revenge.. It is not a crime to kill the dead men. Jane can move on.