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    Source: Colo. Shooter’s Gun Jammed

    Mourners at a vigil light candles near theater where 12 people were killed July 20, 2012 in Aurora, Colorado. A graduate student who told police he was the Joker opened fire in a theater showing the premiere of the latest Batman movie near Denver. AFP PHOTO/DON EMMERT        (Photo credit should read DON EMMERT/AFP/GettyImages)

    Don Emmert, AFP / Getty Images

    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.

    Read it at Associated Press