This whole thing is dumb, lol.
Death penalty is bullstuff - if I went around on a killing spree and I got captured, being trapped in a prison cell for the rest of my life would be the most terrifying loving thing on the face of this very planet. I'd go insane, I'd go corrupt with guilt, I'd be in so much pain and I'd regret every second of what I did.
If I did all that knowing I'd just get killed in the end, well forget it. I'll just go end a bunch of innocent lives if they're just gonna end mine. It's not like I care, lol. I'll be dead right?