Facing legal challenges and a shortage of drugs for lethal injections, Oklahoma was the first state to announce a plan to use nitrogen to execute prisoners on death row. Mississippi and Alabama soon followed, though none of the states has tried it yet. Critics say the science behind using nitrogen to kill people is spotty at best, and there's no way to know if it will be as "painless" as advocates presume. Today we are joined by Appeal staff reporter Lauren Gill to discuss the questions around nitrogen gas and the continuing search for ways to end human life behind bars.
