Im had to rewatch all the episodes and here is an interesting quote from S6 E07.
 
(Right after Lisbon and Jane questioned Smith about the BA.)

Libson: You believe him ?
Jane: He confessed a murder. Red John would never break like that, not even as an act.

Really interesting if you think the way McAllister acted at S6 E08. And that was 1 episode before S6 E08.