Byron Black died at 10:43am Tuesday, roughly 10 minutes after the lethal injection started. He could be heard sighing and breathing heavily as the execution began.

Tennessee is set to execute death row inmate Byron Black on Tuesday despite raised concerns about his implanted heart device which could cause a "prolonged and torturous…

Byron Black died at 10:43am Tuesday, roughly 10 minutes after the lethal injection started. He could be heard sighing and breathing heavily as the execution began.