Byron Black, 69, was killed by lethal injection for the deaths of Angela Clay, 29, and her daughters, Latoya, nine, and Lakeisha, six, on Tuesday.

Lawyers for Byron Black, found guilty of three murders, have argued that an execution may be more painful because of his heart implant.

Barring a reprieve, Byron Black’s execution will go forward amid concerns implanted defibrillator will shock his heart