What terrible things do we learn about Jamison in Gathering Blue?

Over the course of the novel, we learn that Jamisom is a far different man than the understanding, caring man who represents Kira in front of the Council of Guardians. He is the man responsible for Kira's father's disappearance.... the man who shot his professed friend in the back and left him for dead. Jamison also conspired to kill both Katrina and Annabella before taking on the role of Kira's father figure and mentor.