Under the state's new procedure, Hoffman will be strapped to a gurney and forced to breathe pure nitrogen gas through a full-face respirator mask. The protocol is nearly identical to that of Alabama, which became the first state to use nitrogen hypoxia as a method of execution last year.

The Supreme Court has ruled that convicted killer and rapist Jessie Hoffman’s execution using nitrogen gas can proceed as scheduled, despite arguments from his lawyers that it violates his