A would be carjacker was stopped by an armed citizen in Atlanta and held at gunpoint until police arrived. Edgar Horn, 61, allegedly slipped into the passenger's seat of his car as he pulled into a Family Dollar on Marietta Boulevard. "You know what this is," Horn allegedly told Fannin. That's when Fannin pulled out his gun and told Horn to get out of his car. Apparently Horn thought he could just leave, but Fannin wasn't having any of that.