"The shameful spectacle of Georgia's death penalty"

A quick snapshot of a human rights outrage right here in our backyard:

Warren Hill has an IQ of 70 and has been declared by a state judge to be "mentally retarded" by a preponderance of the evidence. In other states, that would mean his execution would be an unconstitutionally cruel and unusual punishment.  But not in Georgia, where a prisoner must prove his "mental retardation" beyond a reasonable doubt, a virtual impossibility given the inexact science of measuring mental disability.

Add to this the fact that the victim's family and several of the jurors from his trial now oppose his execution, and one wonders: why is the state of Georgia – which is seeking to lift the stays – trying so hard to kill Warren Hill?  Who is this execution for?