The issue is not that they don't know of any ways to kill a person. The issue is they are required to do it without pain and suffering. And we don't know if thi

The issue is not that they don't know of any ways to kill a person. The issue is they are required to do it without pain and suffering. And we don't know if this went wrong because of the drugs or because they were administered incorrectly. It is possible that even if the old drug was used here that the same problem could have happened. It might just be a stupid coincidence that the IV was placed improperly during the same execution they used these new drugs for the first time.