Byron Lewis Black, convicted for the 1988 shooting death of his girlfriend and her two young children, was executed in Tennessee on Tuesday morning. He was 69. Black died by lethal injection at 10:43 Central time,

An inmate executed by Tennessee without deactivating his implanted defibrillator said he was hurting badly shortly after the lethal injection began, according to several witnesses.

Tennessee death row inmate Byron Black moaned and said he was in pain during his execution, according to reporters who witnessed the lethal injection Tuesday morning. Black's attorney said his distress was evidence he was "tortured.