By Rose Carmen Goldberg* A series of botched executions over the past several years has engendered increasing criticism of lethal injection. These high-profile miscarriages have involved prolonged visible suffering, including violent spasms and outcries about intolerable pain. Death row inmates are turning to courts for protection from painful deaths like these. Last month the Supreme Court heard oral arguments in its first lethal injection case since 2008, Glossip v. Gross. The challenge, …