A federal law enforcement official said suspect James Holmes is believed to have propped open an exit door in the theater as the movie was playing, donned protective ballistic gear and opened fire. The official spoke on the condition of anonymity to discuss the ongoing investigation.
Police in Aurora, Colo., said Holmes fired at least 71 shots and killed at least 12 people. Police said he had an AR-15 assault rifle, a shotgun, and two .40-caliber Glock handguns. Holmes is also believed to have hurled a gas canister into the theater before opening fire.