MONTGOMERY, Ala. (AP) — A federal judge on Friday refused to stop what would be the fourth nitrogen gas execution in the U.S., saying the inmate had not proven his claims that the new method is unconstitutionally cruel and causes psychological terror.

Chief District Judge Emily C. Marks rejected Demetrius Frazier’s request for a preliminary injunction to either stop his execution on Thursday in Alabama or require that the state give him a sedative before administering the gas.

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