The issue is this may be considered "cruel and unusual" punishment, and that is what lethal injection was designed to avoid. However, there are all sorts of problems with lethal injection in practice. Nitrogen would effectively be a better lethal injection without the complications (drug inventory, dosing amounts, etc).
The issue here isn't killing people. It's doing so in a way the defense lawyer can't argue against to a judge.
The issue is this may be considered "cruel and unusual" punishment, and that is what lethal injection was designed to avoid. However, there are all sorts of problems with lethal injection in practice. Nitrogen would effectively be a better lethal injection without the complications (drug inventory, dosing amounts, etc).
The issue here isn't killing people. It's doing so in a way the defense lawyer can't argue against to a judge.