Not a theory, just some weird questions about the last episode.

Stiles received the note after the team debrief, cooper, reede and McAllister meeting. So one of them can be suspected to be the author of the note.

After the note scene, Haffner met Lisbon , in a public place, so maybe Lisbon is afraid somehow of Haffner.

After the visit in bertram's office, lisbon did a real weird and disappointed face, why ?

When Patrick Jane told everyone in the room that one of them is Red John because of the tatoo, Bertram take a interesting look on his right as if He is thinking about it.