Alan Miller shook and trembled on gurney after becoming second person to be executed by controversial technique
Alabama has carried out the second execution in the US using the controversial method of nitrogen gas, an experimental technique for humans that veterinarians have deemed unacceptable in the US and Europe for the euthanasia of most animals.
Alan Eugene Miller, 59, was pronounced dead on Thursday evening at a south Alabama prison. The lethal method involves being strapped to a gurney, where a respirator mask is applied to the face and pure nitrogen piped in. The resulting oxygen deprivation will cause death by asphyxia.
Miller shook and trembled on the gurney for about two minutes with his body at times pulling against the restraints, followed by about six minutes of gasping breathing, according to the Associated Press.
Miller’s death is the latest in an extraordinary week in the US in which five condemned men in five states are set to be killed over six days. Three prisoners have already been executed – on Friday South Carolina killed Khalil Divine Black Sun Allah in its first execution in 13 years, then on Tuesday Texas killed Travis Mullis and Missouri put to death Marcellus Williams.
It doesn’t mean thousands of litres per second to do it properly. A mask or helmet could be considered a poor tool for the job, though, because they are easier to fight/struggle with, and the person could hurt themselves in the process of that.
You need the normal level of air replacement for any given volume with a human in it, but you need to be using nitrogen as the source of air replacement. If you want to speed the process up, you could do 1x space volume/minute for a couple minutes, then drop it down to a normal rate of replacement.
Choosing a larger volume will not make it painful, but it will make it slower unless you increase the flow. But slower is not bad, per se, except that since it’s an execution, faster is possibly more merciful (depending on the person’s preference) because the person has less time to sit there and contemplate the fact of their death.
The suicide pods are pretty much the ideal balance of space taken. For an execution, perhaps a small room with a chair, and a somewhat faster nitrogen replacement rate (like, 60 volumes/h for the first two minutes, then 5 volumes/h after that).