 CBS News special report. President Biden is expected to address the nation soon as we learn more about the attempted assassination of Donald Trump. CBS' Scott McFarlane reports the FBI identified 20-year-old Thomas Crooks as the gunman. Law enforcement sources tell CBS News Crooks fired an AR-style rifle from the top of a shed about 200 to 300 feet away from where Trump was speaking. At least one spectator was killed and two others were injured.