 engaged after it was clear that shots were being fired, that this was an adversary. And we were told by our sources that this counter sniper was able to pinpoint him and then take him out with a shot from his rifle from a distance away. Now that's Pierre Thomas reporting. 20-year-old Thomas Matthew Crooks is named as the shooter in the assassination attempt. Crooks' former classmates spoke about his prior experience of the gunman in high school. He did sit alone at lunch.