Garrison failed the polygraph test due to concealing his affair with the First Lady. Breckinridge confronts him at his home and interrogates him, pinning him as the prime suspect. The source of rancor between them comes to light: Breckinridge believes Garrison had an affair with his wife and caused the breakup of their marriage, which Garrison denies. Garrison escapes capture and conducts his own investigation of the assassination plot. He tries to contact the informant who gave him the tip, but finds that he has been killed. In pursuit, Breckinridge gets the drop on Garrison but is unable to kill him, despite having given other agents "shoot to kill" orders. Using his contacts with sympathetic agents and family members, Garrison tracks down the location of one of the assassins, whom he kills in a firefight. He searches his apartment, finding evidence that shows the perpetrators are headed to Toronto to attack the president at a G8 summit. He leaves it in the apartment and tells Marin about it, but the Secret Service find that the evidence and body of the assassin were removed before they arrived.