Ms. DAHLIA LITHWICK (Legal Analyst, Slate): That's right, Alex, and 37 of the 38 states that currently have the death penalty, this is their preferred method of execution, but prisoners are complaining that it doesn't work, that it's causing a tremendous amount of pain, more so than was present in death sentences using the electric chair or gas.

NPR: Slate's Jurisprudence: Cruel, Unusual Injections?