 We must stand together. The president went on to say there is no place in America for violence, like Saturday's assassination attempt on former President Donald Trump. The FBI is leading the investigation, and NPR justice correspondent Ryan Lucas is following that investigation. Ryan, good morning. Good morning, Steve. What are the facts you know? Well, the FBI says they believe that the shooter, 20-year-old Thomas Matthew Crooks, acted alone. The main question hanging over this, of course, is motive, and the FBI says at this point it has not identified a motive.