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 with dementia and multiple organ failure, was executed by lethal injection despite having an active heart device his attorneys argued could cause extreme pain. Witnesses say he appeared to suffer during the procedure,

Lawyers for Byron Black, who is scheduled to be put to death this month, say his defibrillator may be unnecessarily triggered and subject him to "severe pain."