text:  Live from NPR News in Washington, I'm Nora Rahm. More details are emerging from last night's shooting at a Trump rally in Butler, Pennsylvania. One spectator was killed and two others were wounded. The former president says a bullet pierced the upper part of his right ear. Secret service agents returned fire, killing the shooter. Today, investigators said they believe the gun used by the suspect had been bought by his father six months ago. NPR's Ryan Lucas has more.