then i would think the same thing about paul. by working side to side with the guy, i could see that he was smart. super smart guy. >> reporter: by the time the rice crop came in the first couple weeks of october the whole case had gone into a kind of stall. atf agent brian parker was particularly frustrated. while the door of the electrical panel had been recovered the box, itself, where the bomb had been placed, was still missing. >> the most logical place where that remains of that panel was, was in the river that was directly behind where the explosion occurred. >> reporter: so they called in an fbi dive team which spent days mucking through the bottom of the canal next to where the bomb had gone off. agent parker, who had been monitoring the search, had a strange incident as he was leaving one day. >> and all of a sudden the tire went flat. >> reporter: this is what flattened the tire.