I agree he should be put to death.. Who cares if the first drugs effectiveness is lessened and he will feel more of the pain.. It should be excruitiating for him.. He raped and murdered 2 women and didn't care about the pain he put them through... Make him feel some pain.. If they can't use this method, electrocute him, or hang his fat @$$.. If he hangs, his weight won't be a problem.. It will be over with quicker.
I hope his claim is rejected.