 INVESTIGATORS SAY THE SHOOTING HAPPENED AFTER AN ACTIVE SHOOTING INCIDENT THAT AT LEAST NICKED IF NOT WENT THROUGH THE EAR OF THE REPUBLICAN NOMINEE OR EXPECTED NOMINEE ALONG WITH OTHER INDIVIDUALS. TWO PEOPLE CRITICALLY INJURED. AND ONE WHO LOST HIS LIFE IN ADDITION TO THE SHOOTER. AND, YOU KNOW, I'M LOOKING AT THE RESEARCH DONE BY OUR DATA JOURNALISM TEAM HERE AT CBS NEWS LOOKING AT THESE ACTIVE SHOOTING INCIDENTS.