Dear Governor XX, I do not believe that Death Penalty is the key to solve criminality in your state.
Statistics are there to prove it.
Dear Governor XX, Death Penalty is not a deterrent. Do not kill him. You know his case, you do not ignore what the psychiatrists said upon his mental health. The world will then know that you are a man of justice. He has an IQ so low that it puts him in the borderline mental retardation range.