What happened at the nation's first nitrogen gas execution: An AP eyewitness account

Alabama executes a man with nitrogen gas, the first time the new method has been used

Alabama man shook violently on gurney during first-ever nitrogen gas execution

Alabama death row inmate is executed nearly 30 years after murder conviction

Alabama inmate executed against wishes of victim’s family took three hours to die

Alabama inmate put to death in first U.S. nitrogen gas execution

Alabama inmate faces death by nitrogen gas

Alabama puts man to death in the nation's fourth execution using nitrogen gas

How new Death Row execution method that's never been used before works