Alabama puts man convicted of killing 3 to death in the country’s second nitrogen gas execution

ATMORE, Ala. (AP) — Alabama used nitrogen gas Thursday to execute a man convicted of killing three people in back-to-back workplace shootings, the second time the method that has generated debate about its humaneness has been used in the country Alan Eugene Miller, 59, was pronounced dead at 6:38 p.m. local time at a south Alabama prison. He shook and trembled on the gurney for about two minutes with his body at times pulling against the restraints. That was followed by about six minutes of periodic gulping breaths before he became still.