William Earl Lynd spent nearly 20 years on death row
A convicted murderer has been executed in the US state of Georgia, after the US Supreme Court rejected an appeal.
William Earl Lynd was put to death by lethal injection, making him the first prisoner to be executed in the US since last September.
Executions had been halted while the Supreme Court considered whether lethal injections broke a constitutional ban on cruel and unusual punishment.
The court ruled last month that such executions were constitutional.
Mr Lynd, 53, was convicted of kidnapping and killing his girlfriend nearly 20 years ago.
Both the Georgia Supreme Court, and the US Supreme Court, rejected his appeal for a stay of execution.
Lethal injection is used by 37 of 38 American states which have the death sentence on their statute books.
The inmate is given three drugs - a sedative, another that paralyses all muscles except the heart and a final drug which stops the heart, causing death.
Three drugs are given to prisoners being executed by lethal injection
States began using the injections in 1978 as an alternative to previously used methods of execution such as electrocution.
Concerns were raised about lethal injection recently when it was discovered that some prisoners were taking up to 30 minutes to die instead of 15.
A 2005 study also sparked controversy by suggesting the amount of sedation given might not be enough to stop the inmate feeling the painful effects of the other drugs - but would prevent him crying out.
The US Supreme Court case against lethal injection was made by two death row inmates in Kentucky.