 They disagree. We are not enemies. We're neighbors. We're friends, co-workers, citizens, and most importantly, we are fellow Americans. There is no word yet on why the shooter, who was killed by a Secret Service sniper, opened fire at the rally in Butler, Pennsylvania, nicking Mr. Trump in an ear. ABC's Aaron Katursky. The bomb squad cordoned off his home in Bethel Park. Authorities searched his car at the scene in Butler and his home, telling ABC News they found what appeared to be rudimentary explosives in both locations.