Georgia has scheduled an execution date for the death row prisoner Troy Davis, whose case has been taken up by death penalty opponents across the globe. Davis was convicted for the 1989 killing of an off-duty white police officer. Since then, seven of the nine non-police witnesses have recanted their testimony, and there is no physical evidence tying him to the crime scene. A judge has signed an order for Davis’s execution sometime between September 21 and September 28. It is the fourth time in as many years that Davis has been scheduled for execution. The U.S. Supreme Court turned down an appeal from Davis in March.