You really don't know?
It would prevent us from putting more innocent people to death in the future. It will also prevent us from unjustly giving death sentences to certain groups (low SES and certain racial/ethnic minorities).
You can prevent a murderer from killing again by life in prison with no chance of release. You can't prevent future misapplications of the death penalty without abolishing it.
Fair enough however again, I don't own a pair of hindsight glasses, I'd like to know where you picked yours up.
I get the argument, here's the crux "A man who is executed is as effective a murderer/rapist as one who is prison for life, that is to say, you get the same outcome, he can't hurt anyone again"
I use the reverse of that, I say "If you execute a man for life you get the same end result as if they were in prison for life, only the finality of his death..."
Okay I actually think I found out something from I Am The Scum, he asked me earlier about a "Feeling"
I'm going to say this, and im sure it will be to my discredit but I'll say it because I prefer not to lie or hide things. By killing this man,
I will feel like everything's right. I don't care to bring Alicia back (my friend) I do care that by killing this man, Alicia's mom, my family, know that he's dead and things feel better.
It still leads me back to my earlier point which JoeTheJuggler brought up; a dead man is equivalent to a man locked up for life, so I just say "well kill him and no one knows the difference"
Joe just doesn't want the chance of being wrong. Neither do I, but I'd give that chance up when I have the knowledge that we're right. I can deal with killing the correct people, when innocent people die, there's nothing I can do to bring them back, I can just ensure we don't make the same mistake again. Much like everything else in life.
This has been an interesting discussion. My grandfather is a judge (was actually, now he's out doing that lawyering thing again) He used to be pro-death penalty but after defending criminals who were to be executed he changed his mind. I never asked why mostly because I rarely see him. I should ask one day, I'm sure it'll be a stimulating discussion.