 AND AT THIS POINT, INVESTIGATORS BELIEVE THAT THE SHOOTER ACTED ALONE AND HE WAS NOT KNOWN TO LAW ENFORCEMENT BEFORE THIS SHOOTING. IN BETHEL PARK, PENNSYLVANIA, I'M CHARLIE DEMAR. CBS NEWS CHICAGO. IT WAS A FRIGHTENING SCENE AT A MIAMI SOCCER MATCH ON SUNDAY NIGHT. THOUSANDS OF FANS WITHOUT TICKETS TRIED FORCING THEIR WAY INTO THE STADIUM FOR THE COPA AMERICA FINAL BETWEEN ARGENTINA AND COLUMBIA. THE MATCH WAS DELAYED MORE THAN AN HOUR.