Ohio prison officials executed a death row inmate, Kenneth Biros, Tuesday with a one-drug intravenous lethal injection, a method never before used on a human. The new method, which involved a large dose of anesthetic, akin to how animals are euthanized, has been hailed by most experts as painless and an improvement over the three-drug cocktail used in most states, but it is unlikely to settle the debate over the death penalty. While praising the shift to a single drug, death penalty opponents argue that Ohio’s new method, and specifically its backup plan of using intra-muscular injection, has not been...