waste incinerator. could this be jimmy hoffa s grave, the fbi digging for answers. reporter: a backyard, a horse farm, a suburban home. underneath, the old new york giants stadium was discounted by investigators, the search found another dead end in the florida everglades. where is jimmy hoffa? now part of american lure. the fbi reportedly searched the site of a former landfill in new jersey last month, looking for the body of union leader jimmy hoffa. so far no hoffa, three jimmies, but no hoffa. reporter: we do know he was last seen outside makis restaurant. there are confirmations he was seed n outside of the restaurant. reporter: he helped build the