A state judge in Arkansas has ordered an autopsy for Kenneth Williams, the death row prisoner who was executed Thursday, amid reports he suffered an unconstitutionally painful death. Witnesses say during the execution Williams was “convulsing, lurching [and] jerking with sound.” Kenneth was the last of four prisoners killed by the state of Arkansas over an 11-day period in April. They were racing to meet a deadline before the state’s drug of the sedative midazolam expired at the end of April.