Precedent for subsequent execution attempts is extremely rare, said Deborah Denno, a Fordham University law professor who has studied lethal injection procedures nationwide.
Can Alabama try to kill the same man twice? →
In Nevada, Denno said, "the circumstances are even worse because the starter drugs they're using before the paralytic heighten the risk that the person is not unconscious."
Lawyers: Nevada execution plan worse than pet euthanasia →