 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. One source saying they look like grenades. CNN is reporting that Crooks' father told them he was trying to figure out what the hell is going on, but would wait until I talked to law enforcement before speaking about his son.