The morning of Friday, April 18, 1997, Daniel Wells of McKinney took the stand in his own defense. Charged with aggravated sexual assault for fondling his girlfriend's 8-year-old daughter, Wells explained it was all a misunderstanding. Wells was a decorated Vietnam war hero, with two Purple Hearts and two Bronze Medals for valor. On cross-examination, testimony revealed that even the mother initially hadn't believed the little girl. It was the war hero's word against the child's. In desperation the prosecutor's office tracked down B.G. Burkett, a silver-haired Dallas financial adviser who has obtained a national reputation as a military researcher...