I personally think death is too easy, unless he is tortured for a week or two before dying. I think having to spend the rest of his life in prison with no freedom is better than a quick execution. Imagine knowing you will never be able to go outside or do anything ever again, to me thats worse than death.
As long as it all ends within a couple of hours behind the courthouse I'm good with it. Blowtorch and pliers for all I care, as long as it ends up in potters field.