MIAMI — A man convicted of abducting and killing a Miami couple and later stabbing a prison guard to death is set to be executed after nearly four decades on Florida's death row.
Askari Abdullah Muhammad, previously known as Thomas Knight, is scheduled to die by lethal injection Tuesday at Florida State Prison in Starke barring a last-minute, successful appeal.
Gov. Rick Scott signed the death warrant after the Florida Supreme Court in December rejected Muhammad's challenge to chemicals used in the state's execution procedure.
Muhammad, 62, was first condemned to die for the 1974 killings of Sydney and Lillian Gans.
After his conviction in the Gans case, Muhammad in 1980 fatally stabbed Correction Officer Richard Burke with the sharpened end of a spoon as he was being escorted to the prison shower. Muhammad was sentenced to die for Burke's killing in 1983.
His execution has been delayed for so long because of numerous appeals and rulings in the Gans case.