Source: AP / CBS News ATLANTA – Supporters of Troy Davis were making a last-ditch effort Monday to stop his execution for the 1989 murder of an off-duty Savannah police officer, asking the Georgia pardons board to grant clemency to the high-profile death-row inmate now that his legal appeals are exhausted. The five-member Georgia Board of Pardons and Paroles met at 9 a.m. Monday to consider arguments surrounding Davis, who claims he is innocent of the killing of Mark MacPhail. [...]