Disagree. I am not talking about someone killing someone in a bar fight, or running someone over due to cheating accusations. There was clear example of torture and sadism to another human. This is not something that can ever be changed or rehabilitated. People that do stuff like this force people serving time in prison for not as serious stuff (armed robbery, dope dealing, assault, ect) to have to kill in self defense and likely have their sentences extended to life. Some guy selling crack deserves his sentence. He doesn't deserve to spend time in gen pop with a fucking serial killer.
I do agree that the way the death penalty is handled here is idiotic. In Japan it's done much more quickly and ruthlessly.
Edit: Misread your post, I see you are not necessarily in favor of ending the death penalty, just that the way the US does it is half-assed.