I didn't read the rest of the article, due to registration requirement, but I think it's really important to distinguish between innocent of the crime for which the death penalty was imposed, and totally innocent. A lot of these cases involve someone who was a lifelong criminal with plenty of convictions and was present while a crime was being committed, but may or not have actually pulled the trigger. Or someone so well-known in his neighborhood as frequent crime committer, that witnesses who knew him mistakenly assumed it was him that they saw, when actually it may have been someone else of similar appearance. Now when someone who is TOTALLY innocent gets mistakenly executed for a crime they didn't commit, that's a huge problem, but when some career thug gets fried for some crime other than one of the many he actually did commit, I'm not going to lose any sleep over it.