Over and above all the reasons to oppose the execution of guilty offenders, surely the most compelling argument against the death penalty is the possibility likelihood of executing those who are innocent. How much evidence would it take to sway you, if the prospect does not already give you pause? Take a look at David Grann’s examination of the case of Cameron Todd Willingham, put to death after convicted of setting the house fire that killed his two children largely as a result of forensic conclusions which, in the opinion of a number of experts on the investigation of arson, had no credibility. (The New Yorker)