We cannot be drawn into the culture of death as the Left has been....in this case with a death penalty response to their actions.
We cannot condone the death penalty to "send a message so that it won't happen again" or to seek payback for what the brutal bastard did to Kirk and his family.
All life is precious - even guilty life (perhaps most especially guilty life since martyrs such as the pure catholic school children gunned down while praying in mass or unborn children aborted by those seeking convenience have secured eternal life in heaven while the killers are facing eternal damnation for their mortal sins unless they repent sincerely which is much less likely if they are killed for their actions with less time to reflect).
It's a tough challenge to be honest. But only God has the right to determine the worthiness of life.