How did it fail? He died, didn't he? And, I'm assuming, that was the intended outcome? If I could be bothered, I'd find out why he was sentenced to death, but I'm really not that interested. I'd assume that it was a murder (sorry, Mericans: "homicide") in which case I'm sure the comfort of his victim during the death process wasn't a top priority for him. Easy answer: shoot the fucker. Way quicker, and cheaper. (Personally, I'd go for a gutshot - a slower and more painful death, I believe?) Isn't the death sentence supposed to be a punishment? Why the fuck SHOULD it be as painless as possible???