New evidence and/or leaks in the case of James Holmes, the gunman may have been under the care of a college psychiatrist and sent a letter to that person before opening fire:
CBS News — On Monday afternoon, investigators scoured the mailroom at the University of Colorado-Denver/Anschutz Medical Campus and found what they’d been searching for: a piece of mail from the suspect in the Aurora, Colo., shooting that killed 12 people and injured 58 at a midnight screening of the new Batman film last week. Before opening it, the sheriff’s bomb squad handled it with a robot and took an X-ray, just in case there were explosives inside. … Sources told Miller the letter was from a pent-up Holmes to one of his professors. In it, he talked about shooting people and even included crude drawings of a gunman and his victims.
Beyond the obvious public interest, this could turn out to have an affect on how the case is defended, and could even affect future gun laws. People found mentally defective by a judge or who have been committed to an institution are barred by
Illinois Colorado state law from purchasing firearms.