Colorado deadly shooting leaves nation shocked, grieving

Published On: Jul 20 2012 04:05:21 PM EDT   Updated On: Jul 20 2012 04:16:45 PM EDT

Police say Holmes, 24, dressed head-to-toe in protective tactical gear, set off two devices of some kind before spraying the theater with bullets from an AR-15 rifle, a 12-gauge shotgun and at least one of two .40-caliber handguns police recovered at the scene.