Carey Dale Grayson executed in Alabama using nitrogen hypoxia method

Carey Dale Grayson was executed in Alabama using nitrogen hypoxia, becoming the third person in the U.S. to die by this method. The execution took place on Thursday night at a state prison in Atmore. Grayson, 50, was convicted of the 1994 murder of hitchhiker Vickie Deblieux. His execution follows concerns raised about the method, which has been described as torturous by witnesses of previous executions. Alabama allows inmates to choose between lethal injection, nitrogen hypoxia, and the electric chair. Grayson's execution is part of a series of nitrogen hypoxia executions scheduled in the state.