 before any shots were fired. It is not clear if Crooks had a gun with him at that point. Sources also say an officer saw Crooks on the ground earlier and called him in as a person who was suspicious. Lawmakers will be holding a hearing on Capitol Hill next week as they continue to try to get to the bottom of how this happened. World News with David Muir will have much more on the investigation and the latest from the Republican National Convention. That's ahead right here at 630 on Channel 9.