Yet another good reason for states to have a law, that if the preferred method of execution has been blocked, the default means of execution will be with firing squad.
The firing squad is inexpensive, quick, very difficult to appeal as a technique, needs to special chemicals, tools or training, and can be carried out by any LEO.
And any concern about blood and gore can be alleviated by giving the condemned an absorbent vest.
I wonder why carbon monoxide isn’t used?