>> i believe it was a political prosecution. there's no doubt in my mind. i'm 100% certain that it was. >> reporter: here is all you need to know about the case. the u.s. attorney's office, under whitaker's direction, spent more than two years going after mccoy using the fbi, a paid informant, secret recordings, a special prosecutor. and after two years, it took a jury mere minutes to reach its verdict. not guilty. >> that's correct. i was acquitted within really 20 minutes. >> reporter: whitaker was criticized heavily in iowa's press. reporters asking, why was mccoy prosecuted? legendary "des...