@CNN: The semi-automatic rifle used in the Colorado theater killings jammed during the rampage, apparently because of a problem with the 100-shot magazine feeding it, a law enforcement source says https://t.co/WLyL4VKItn

@CNN: The semi-automatic rifle used in the Colorado theater killings jammed during the rampage, apparently because of a problem with the 100-shot magazine feeding it, a law enforcement source says https://t.co/WLyL4VKItn