20 March 2018 :

Oklahoma Announces Plans to Execute Prisoners with Nitrogen Gas. At a news conference on March 14, Oklahoma Attorney General Mike Hunter and Corrections Director Joe M. Allbaugh announced that the state plans to switch its method of execution from lethal injection to nitrogen gas asphyxiation. Attorney General Hunter said the move to nitrogen hypoxia was necessary “because of the well-documented fact that states across the country are struggling to find the proper drugs to perform executions by lethal injection."