Troy Davis killed in controversial execution
Troy Davis has been put to death by lethal injection for the 1989 murder of an off-duty policeman.
Earlier, the US Supreme Court denied a stay of execution, clearing the way for his immediate death in Georgia.
"The application for stay of execution of sentence of death presented to Justice (Clarence) Thomas and by him referred to the Court is denied," the court said after deliberations delayed the execution by more than three hours.
Davis had escaped three previous dates with death in a racially-charged case in America's Deep South that has dragged on for more than two decades and made him a poster child for the worldwide campaign to ban the death penalty.
The family of policeman Mark MacPhail's family meanwhile continued to insist Davis was guilty. Several of them were in the Jackson state prison to witness him die.
The last-gasp bid to stay Davis's execution had earlier been rejected twice at state level and the five-member Georgia Board of Pardons and Paroles on Tuesday turned down his bid for clemency.
