Argument of Executing the Wrong Person

What if there is a small chances of executing wrong person? Some people believe that human life is sacred and that society has no right to take it. The rules of our government doesn't allow those folks to serve on a death penalty jury. But even if you don't believe that every human life is sacred, the thing that should nag at your conscience is the thought that you might be condemning the wrong person to death. As a matter of history, don't we know that it happens? Don't we know that we've executed people for crimes they didn't commit? Shakespeare in his play Hamlet described death as "the undiscovered country, from whose bourne no traveler returns." Before you send another human being into oblivion, you should be absolutely sure in your own conscience that it's the right person.