I kept wondering who killed the spy-woman, and while focusing on the three dots, I just forgot about Cho's question to her. He asks: is he visualize? She says yes.
Bertram, McAllister and Smith are not visualize.
Haffner and Stiles don't possess the tattoo.
So maybe it was Jason Cooper, though Jane believes the man when he denies having the CBI bugged. But it's not unlikely that Stiles wanted to have a man of his own inside Tyger Tyger. That man is not Haffner. Could the attractive spy-woman have slept with someone like Cooper?
And apart from that: is Tyger Tyger chasing Red John, or protecting him? If they're chasing him, why are they acting so aggresive all over, especially Smith?