According to the police, Mr. Holmes — armed with an assault rifle and other guns, and ensconced in battle armor — indiscriminately and emotionlessly shot at moviegoers, some of whom were children, and some of whom were trying to escape. The rampage also appears to have been premeditated. Mr. Holmes recently bought thousands of rounds of ammunition and, on the night of the movie premiere, authorities say, he calmly purchased a ticket and returned to his car to prepare himself before reentering the theater to disorient and then shoot at the large crowd. He now faces charges of killing 12, including a 6 year-old girl, and injuring dozens more. That mass shooting inflicted deep psychological wounds on countless others.