Capital punishment. Do you guess is legitimate?

I don't have a moral problem with executing murderers, but I am opposed to capital punishment on the practical grounds that no-one has ever devised a perfect judicial system. Mistakes get made and sometimes people are wrongly convicted. If you send someone to jail and find out that a mistake's been made, you can always let them out - but if you've executed them, there's nothing you can do about it.

Hi, i guess nobody have the right to kill another person, also if they call this "justice". For my opinion Justice should be something that give a punishment, as well as the possibility to turn into a right way to live.

I'm disagree with capital punishment, I guess jail is a punishment, and maybe can change the people, capital punishment is just a revenge. Something that sounds like medieval. And more, in some countries they kill the people after years, maybe 10 or 15... is just a torture. If you decided for a capital punishment why you want torture that man, letting him live without know every day if he will have another day of life or not? That's the most horrible thing you can do to anyone, no matter what's his guilty, that's an horror, and a civil society can't do that.