Oklahoma Says It Will Now Use Nitrogen Gas As Its Backup Method of Execution

schwit1 writes Yesterday, Oklahoma governor Mary Fallin signed into law a bill that approves the use of nitrogen gas for executions in the state. The method, which would effectively asphyxiate death row inmates by forcing them to breathe pure nitrogen through a gas mask, is meant to be the primary alternative to lethal injection, the Washington Post reports.

Fallin and other supporters of the procedure say it's pain-free and effective, noting that the nitrogen would render inmates unconscious within ten seconds and kill them in minutes. It's also cheap: state representatives say the method only requires a nitrogen tank and a gas mask, but financial analysts say its impossible to give precise figures, the Post reports.

Oklahoma's primary execution method is still lethal injection, but the state's procedure is currently under review by the Supreme Court. Earlier this week, Tennessee suspended executions statewide following challenges to its own lethal injection protocol.