Jimmy,
I agree that it's a sad situation, but disagree about the lack of incentive for a local prosecution. Tennessee has a state Attorney General system, so the prosecution would be from a state official, not a Knoxville district attorney. With that said, however, local officials, from sheriffs, police departments and city and county attorneys, are often the most vigorous prosecutors, since they have a vested interest in the communities where they live, and want to weed out the bad apples that bring disrepute to the area, and, by association, to its citizens.