A man who battered an estate agent to death using a plant stand at a model home in Texas has been executed by lethal injection.
Kosoul Chanthakoummane, 41, was found guilty of killing Sarah Walker who was found with more than 30 stab wounds at the house in McKinney, near Dallas, in 2006.
He had always claimed his innocence and there have been doubts about the reliability of evidence that was used against him at trial.
