FILE - This undated file photo provided by the Georgia Department of Corrections shows death row inmate Troy Davis. Georgia's pardons board on Tuesday, Sept. 20, 2011, rejected clemency for Davis despite high-profile support for his claim that he was wrongly convicted of killing MacPhail in 1989. Davis is set to die on Wednesday, Sept. 21. It is the fourth time in four years his execution has been scheduled by Georgia officials. (AP Photo/Georgia Department of Corrections, File)
ATLANTA 11:14 Update
JACKSON, Ga. (AP) — Georgia inmate Troy Davis has been executed for the killing of an off-duty police officer in a case that has drawn worldwide support over his claims of innocence. Courts consistently ruled against him, however, and the officer's family says they finally have justice after 22 years.
10:26 p.m. update
WASHINGTON (AP) — US Supreme Court refuses to block execution of Troy Davis
6:22 p.m. update
Troy Davis files last-ditch plea asking US Supreme Court to stop his execution in Georgia.
5:45 p.m. update
The Supreme Court of Georgia today unanimously denied a stay of execution for Troy Anthony Davis, the court said in a statement issued minutes ago.
Davis, 42, is scheduled to be put to death tonight at 7:00 p.m. by lethal injection at the Georgia Diagnostic and Classification Prison in Jackson, GA. The Court denied Davis’s Motion for Stay of Execution, as well as his request for the Court to hear another appeal.
Davis was convicted of the 1989 murder of Savannah Police Officer Mark Allen MacPhail.
A defense attorney says Georgia prison officials have blocked inmate Troy Davis from taking a polygraph test before his scheduled execution.
Attorney Stephen Marsh told The Associated Press on Wednesday that the Georgia Department of Corrections has denied his request to allow Davis to take a polygraph test. Davis is scheduled to die at 7 p.m. EDT Wednesday.
Davis has long claimed he is innocent of killing Mark MacPhail, an off-duty police officer working as a security guard in Savannah, Georgia. But state and federal courts have repeatedly upheld his conviction.
Prosecutors and MacPhail's relatives say they have no doubt the right man is being punished.
Marsh had said he hoped the polygraph test would convince the state pardons board to reconsider a decision against clemency.