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Source: Colo. Shooter’s Gun Jammed

Batman mask reportedly found at Holmes's apartment.

James Holmes’s semiautomatic assault rifle jammed during the attack that killed 12 people and left 58 wounded at an Aurora, Colorado, screening of The Dark Knight Rises, a source told the Associated Press on Sunday. The source, a federal law enforcement official, said a weapon with a 100-round drum magazine—which can fire 50 to 60 rounds per minute—was recovered at the scene; Holmes reportedly had to switch to a weapon with less firepower after the first one jammed. Holmes, 24, opened fire at a midnight showing of the new Batman movie on Friday. A law enforcment official told the Associated Press that a Batman mask had been found inside Holmes's apartment. Aurora police chief Dan Oates also said that Holmes had "lawyered up" and would not cooperate with police.