Tennessee death row inmate cries out in pain during lethal injection after state refused to deactivate defibrillator implant A Tennessee death row inmate cried out in pain after the state refused to deactivate his implanted defibrillator as he was executed for murdering his girlfriend and her two young daughters. Byron Black, 69, was pronounced dead at 10:43 a.m., about 10 minutes after receiving a lethal injection at the Riverbend Maximum Security Institution in Nashville, according to state correctional officials.