Kenneth Williams’ attorneys have appealed to US supreme court to stop his execution on grounds of intellectual disability. Arkansas has carried out its fourth execution within a week, bringing to a troubling end the state’s controversial attempt to run a “conveyor belt of death” in an aggressive burst of killings unseen in the US for more than half a century. Kenneth Williams was pronounced dead at 11.05pm local time at the end of a 13-minute lethal injection that resulted in disturbing signs of distress on the part of the prisoner.



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