Wrong.
The death penalty is a completely ILLOGICAL recourse from any point of view other than animalistic bloodlust.
And because I'll get called a bleedy heart liberal or some other crap sooner or later, have my solution:
Life means life.
If you're sentenced to life, you get locked up in a small room with nothing but your own thoughts until the end of your natural life.
You get no social contact other than with your jailers when let out of your cell for a small amount of (non-social) exercise.
You are given access to writing materials to enable you to contact legal help et cetera if you need to.
But for 23 1/2 hours a day, you're in that cell.
*n