The article said they used Phenobarbital that is a common drug, not the stupid 3 drug mix most states were using till manufacturers quit making them.
Last time I was in surgery what ever they used, I was out in 10 seconds or so, all they had to do was up the dosage and I would not have woke up ever again.
Seems to me taking 30 years to do that to a tried, convicted, trial, and sentence reviewed by another court, killer/rapist is ridiculous.
My guess is that if the doctors performing them were to order that I be given 4 times as much medication as I was given I would have quietly,and painlessly,gone off to my Reward.
It doesn't sound that complicated to put a living being down.