 The deep differences in both parties and insisting the nation cannot solve its debates with violence. ABC's Andy Field. Thomas Matthew Crooks has been named as the would-be assassin. His motivation still undetermined. FBI agents searched his residence in a Pittsburgh suburb. 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.