Louisiana used nitrogen gas to put Jessie Hoffman Jr., 46, to death Tuesday evening in the state's first execution in 15 ...

Louisiana's protocol says death row inmates will be forced to breathe pure nitrogen through a respirator mask for 15 minutes or for 5 minutes after the inmate's heart rate reaches a flatline on an EKG ...

Jessie Hoffman Jr., who was convicted in a 1996 murder, argued the method of nitrogen hypoxia would violate his ability to ...