Why is the death penalty is always more expensive than the alternative of life without parole

Book: “American’s Experiment with capitall punishment” by James Acker
Readings: Acker Chapter Twenty One
Why is the death penalty is always more expensive than the alternative of life without parole (LWOP). Has the cost of the death penalty played a role in recent repeal measures? In what states? Provide specific examples. Do you think we should eliminate the death penalty because it is so expensive? yes get rid of it