ATMORE, Ala. — Alabama executed a man on Thursday who was convicted in the 1991 rape, robbery and murder of a Birmingham woman, becoming the fourth person put to death by nitrogen gas.

A serial rapist and murderer is to be put to death by nitrogen gas in Alabama on Thursday, the fourth use of the controversial execution method in the southern US state. Demetrius Frazier, 52, was sentenced to death in 1996 for the 1991 murder of 40-year-old Pauline Brown,

Alabama has carried out the nation’s 4th nitrogen gas execution, putting a man to death for the killing of a woman who was raped and shot during an apartment break-in