 FORMER PRESIDENT TRUMP DEFINITELY HEADS HERE TO MILWAUKEE FOR THE REPUBLICAN NATIONAL CONVENTION. GOOD EVENING, I'M NORA O'DONNELL AND THANK YOU FOR BEING WITH US FOR THIS SPECIAL EDITION OF THE CBS EVENING NEWS. HERE'S WHAT WE KNOW AT THIS HOUR. THE FBI IS LEADING THIS INVESTIGATION AS A POTENTIAL ACT OF DOMESTIC TERROR AND WE'RE LEARNING NEW DETAILS FROM THEM. THEY BELIEVE THE SHOOTER ACTED ALONE AND DOES NOT HAVE A MOTIVE YET IDENTIFIED. INVESTIGATORS IN QUANTICO