The current situation reminds me of Lisbon's dream in the first episode of this season. She enters the CBI office and encounters the dead bodies of Rigsby, Cho, Van Pelt, and Jane; while Bertram is drawing a smiley face on the wall and Smith is wiping off the blood on this hands. While she thought it couldn't get any worse Haffner suddenly enters the scene and attacks Teresa. Officially, Smith and Bertram are the only two remaining suspects, this resembles what Lisbon saw when she entered the office, but the actual Red John is the one who unexpectedly snuck up on her, Haffner.