Alabama carries out first execution in U.S. using nitrogen gas

Alabama executed a convicted murderer with nitrogen gas Thursday, putting him to death with a first-of-its-kind method that once again put the U.S. at the forefront of the debate over capital punishment.

Alabama carries out first execution in U.S. using nitrogen gas
A white sign with connected to brick base. The sign reads "W.C. Holman Correctional Facility."

Alabama executed a convicted murderer with nitrogen gas Thursday, putting him to death with a first-of-its-kind method that once again put the U.S. at the forefront of the debate over capital punishment.