Byron Black was executed after a back-and-forth in court over whether officials would need to turn off his implantable cardioverter-defibrillator, or ICD. Black, 69, was in a wheelchair, suffering from dementia, brain damage, kidney failure, congestive heart failure and other conditions, his attorneys have said.

Byron Black, 69, was executed for the 1988 South Nashville murders of his ex-girlfriend Angela Clay and her two daughters Latoya, 9, and Lakeisha, 6.