There are many valid, strong arguments for the death penalty - this is one such case of clear guilt in a capital crime. In cases of irrefutable DNA evidence, & many others, the DP should be used. The definition of "cruel & unusual" should not include hanging, a .22 shot to the head, or other means of instant departure from the world of the living. If done reasonably, the cost of administering the DP should be minimal. Plus society avoids the ongoing cost of feeding, providing medical,etc. to the death row occupants.