<sod >Arkansas has executed murderer Kenneth Williams - the fourth inmate to be put to death by the state in eight days Arkansas has executed murderer Kenneth Williams - the fourth and final inmate to be put to death by the state in eight days.< eod>< sod > Arkansas has executed murderer Kenneth Williams - the fourth inmate to be put to death by the state in eight days A man put to death in Arkansas over the murder of a cheerleader and two others was left lurching and convulsing on the execution gurney before he died.< eod>