I forgot to mention something else: capital punishment does not deter crime. Studies have shown over the years that a death penalty does not prevent crimes from happening.
Also, I am disturbed by some of the ugly, hateful stuff being posted here by Christians. You are not to have hatred toward any man, no matter how awful he is. We can be disgusted and disturbed by a person's actions, and we can feel anger toward them, etc. These are natural reactions. But what we must not do let those hateful, primal impulses take us over to the point were we advocate for the death of another human being. Jesus said, "Love your enemies as yourselves." He didn't list any exceptions to this rule. And when he says "enemy" he doesn't mean the person that annoys you at work; he means anyone that you hate, and especially anyone that hates you and tries to make your life miserable. This new way of living that Jesus and the New Testament lay out is TOUGH. There's no doubt about that. And often it doesn't make sense: why would I keep forgiving someone that keeps doing wrong, or why would I love someone that wants to harm me? Yet this is what Jesus calls us to. We can talk about how difficult it is, and lean on each other for support, but when we start saying "Forget what Jesus said, this guy deserves to die!" . . . I just don't know what to say. If you would like me to post several verses proving supporting my position I can do so, but I'just disheartened at the thought of having to do so.