Byron Black, 69, was executed Tuesday despite warnings that his defibrillator could cause pain. Witnesses say he cried out, “It’s hurting so bad.”

Byron Black is scheduled to be given a lethal injection after a legal battle about whether a working defibrillator in his chest would cause him pain.

Byron Black, a death row inmate convicted of killing his girlfriend and her two young daughters, is scheduled to be executed this morning.