 The shooter, identified as Thomas Matthew Crooks, was killed at the scene. NPR's Quill Lawrence reports. Along with the rest of the country, most people out and about in Bethel Park have no idea what motivated the 20-year-old to open fire at a Trump rally. It just feels different than it did just a couple of days ago. Bradley Plattick was at the mall in Bethel Park getting out of the heat. He was at the Trump rally on Saturday and dove for cover when shooting began. He says it was over quickly.