Unraveling the complex back stories of the more than 200 pardons issued by former Mississippi Gov. Haley Barbour is revealing serious questions about how pardon review decisions were carried out. But perhaps no pardon is as confounding as the case of Harry Bostick. The retired Internal Revenue Service investigator's pardon has been called heinous by critics of Barbour. Someone did n't do their homework on this case, said Democratic state Rep. Steve Holland. When Barbour pardoned Bostick in January, the convicted DUI felon was sitting in an Oxford, Mississippi, jail cell for violating the terms of a previous DUI sentence and was awaiting formal charges from yet another drunken driving accident in October that ended in the tragic death of 18-year-old Charity Smith. Who's at fault in that accident has yet to be determined. The teenage girl from Okolona, Mississippi, had big dreams of saving money and going to college to pursue a business degree. The young woman's death and the controversy surrounding the case have devastated Linda Smith, Charity's mother. She should still be here with me. She should still be here with me. This should not have happened, Linda Smith told CNN during an emotional two-hour interview. Bostick was given a full pardon for a felony drunken driving offense dating from March 2009. That offense was Bostick's third drunken driving arrest in a little more