 FBI Director Christopher Wray on the shooter killed by a Secret Service sniper, Thomas Crooks, who is 20, ABC's Aaron Katursky. They're looking for anything online that might give them a hint about motive. So far, they believe he acted alone and that there is no additional threat, but they're working to confirm that. They also have found no links to any kind of organized terror group. They're still looking to see whether he may be linked to any kind of domestic extremism, but they're not quite sure yet.