RICHMOND, Va. -- A new round of DNA tests that death penalty opponents believed might finally prove that an innocent man was executed in the United States confirmed instead that Roger Keith Coleman was guilty when he went to the electric chair in 1992. In a case closely watched by both sides in the death penalty debate, Gov. Mark Warner announced that genetic testing on semen proved Coleman committed the 1981 rape and murder of his sister-in-law, Wanda McCoy. Coleman went to his death proclaiming his innocence, and a finding that he was unjustly executed would have been explosive news...