After Alabama became the first state to execute a death row prisoner via nitrogen gas in January, the state is set to perform the second-ever execution on Thursday.

Alabama is set to perform the second-ever nitrogen gas execution in the United States on Thursday.

Alan Eugene Miller, 59, was sentenced to death for the 1999 murders of his then-coworkers Lee Holdbrooks and Christoper Scott Yancy, and his former supervisor Terry Lee Jarvis.

Miller was to be executed in September 2022 via lethal injection, but it was called off after officials had trouble inserting an intravenous line to administer the fatal drugs and were concerned they would not be able to do so before the death warrant expired.