They have the death penalty yes, however its there for those that commit "intentional" murder, first degree murder, even if the person commits first degree murder but is clinically proven insane he cant be given the death penalty. Look at the number of death sentences they have had over the past just 50.

The Taxpayer's money is not wasted on keeping him just alive..its being spent on keeping a criminal away from society at the same time letting him pay for his crimes in jail.