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

Byron Black noted intense pain during his lethal injection death earlier this week, with some wondering if it was because his defibrillator wasn’t deactivated.

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,