James Barber was convicted in the 2001 beating death of 75-year-old Dorothy Epps.
Two years ago, the Legislature passed a law creating a firing squad and giving inmates a choice between dying by bullets to the heart or in the state’s electric chair.
Supporters call it a win for justice, but critics worry it will lead to more wrongful convictions.
‘I have thoroughly reviewed the findings in the independent investigator’s report and am directing several actions to ensure the Tennessee Department of Correction adheres to proper protocol.’
Alabama prison officials called off two recent scheduled lethal injections.
The execution comes despite a jury recommendation for life in prison.