Good evening. Im lester holt in for brian. What we have learned in the 24 hours or so after a heavily armed man barged into an Atlanta Area School is beyond frightening and comes as a jarring reminder of what happened just eight months ago in newtown, connecticut, and what could have happened yesterday. Police in georgia say the alleged gunman had nearly 500 bullets and was apparently prepared for a violent showdown with police when he entered the mcnair discovery learning academy. Also new tonight details of his criminal record and what his lawyer said today about his mental state. Our National Correspondent kate snow is in dekalb county, georgia, with the latest for us. Kate . Reporter good evening, lester. This school has a lot of security. A double front door, you have to be buzzed to get in. But the gunman was able to closely follow someone into the school. 800 children were inside the classrooms and yet not one was hurt. Sounded like a shootout. Reporter a selfportrait of michael