 Three attendees were also shot, one fatally. The Secret Service is investigating how the suspect, 20-year-old Thomas Matthew Crooks, made his way onto the rooftop of a building about 150 yards from the stage with an AR-style rifle. He was shot and killed by the Secret Service. At the White House last night, President Biden called on Americans to lower the political temperature in the U.S. Here's NPR's Tamara Keith.