— New Mexico and Connecticut have abolished the death penalty, but their laws were not retroactive so inmates remain on death row.
— New Hampshire authorizes hanging only if lethal injection is unavailable.
— In Oklahoma electrocution may be used if both lethal injection and nitrogen gas are found unconstitutional. The firing squad may be used if electrocution is also found unconstitutional.
— In Tennesee electrocution may be used if lethal injection drugs are unavailable.
— In Utah, the firing squad may be used if lethal injection is found unconstitutional.