A federal appeals court late Thursday afternoon ruled against Troy Anthony Davis, whose claims of innocence have delayed his execution for killing a Savannah police officer in 1989. Judges Joel F. Dubina and Stanley Marcus wrote that Davis failed to meet the procedural requirements for filing a second habeas petition in federal court. Davis has 30 days to appeal to the U.S. Supreme Court. Judge Rosemary Barkett dissented, saying to execute Davis in the face of evidence that may prove his innocence is unconstitutional.