You're missing the point. It's not "what would a perfect world be like?" but, instead, "Is it better that the guilty should die, or that the innocent should live?"
In the theological sense, certainly none of us are innocent; but the government's job never was to render that sort of judgment based on the heart, but rather to protect it's people and their land and to promote righteousness by punishing evil actions... and in the sense of fabricated evidence and malicious prosecution, both erode and run counter to government's second purpose.
” but, instead, “Is it better that the guilty should die, or that the innocent should live?””
How does letting 10 murderers going to save innocent lives? I would rather than those 10 murderers put to sleep, because they would not be able to murder anyone further. If you are innocent, you have rights and FREE legal representation. Take responsibility of your own legal issues and you will be fine.