Louisiana Gov. Jeff Landry announced the state will resume executions after a 15-year hiatus, potentially using the experimental method nitrogen hypoxia.

Gov. Jeff Landry announced the Louisiana Department of Public Safety and Corrections has implemented protocol to carry out death sentences using nitrogen gas.

If nitrogen hypoxia is used, an inmate breathes 100 percent nitrogen, which causes suffocation. Louisiana is one of four states that have approved it for executions.

Louisiana corrections officials have drafted and approved a new policy to allow the state to restart executing death row inmates, Gov. Jeff Landry said Monday. The latest: The policy is modeled after Alabama's execution methods,