Quite simple really - you can give someone the death penalty if you agree to take their place if proved wrong
You , as a citizen of your country, have an obligation , if chosen , to sit on a jury. You're saying you would be less likely to convict if you were sending someone to the gallows than if you were sending him to jail for life?
That's cowardly, dishonest and immoral. It's also illegal.
You have a legal responsibility to deliver your best attempt at a true verdict, but you won't do that if it means killing someone? But you don't mind the risk of being wrong if you just take away his freedom for life, because you (or someone anyway) can
pay him off if it turns out you screwed up?
That seems to me to be about as gutless as you can get.
It's an absolute denial of moral responsibility.
I absolutely agree that the responsibility placed on lawyers, judges and jurors is a heavy one and that there should indeed be penalty for egregious error, just as there is penalty for egregious error on the part of a bus driver or any person responsible for the lives of others.
What we need to do, is make as sure as humanly possible that we don't get it wrong. I repeat that if people have so little confidence that we can get a safe conviction even in the case of a multiple murderer, then we need to rethink the system.
As for the simplistic assumption that executing someone is a moral evil. That's an opinion, pure and simple, nothing more. We will have to agree to disagree on this one.
Or call the troops home and disband the army, navy and air force.
ETA-Moss- Some members of society are more vulnerable than the rest, while others are more vicious and determined to have their way by any means. The point of law is to try to redress that balance in order to protect the weak. (At least that's the only point I can see. ). That means that the state arrogates to itself the right to punish, to incarcerate, to kill. To itself. It's illegal for you to collect taxes from your neighbours- that's called a protection racket. It's illegal for you to demand that I join your army and go abroad to shoot people. That's piracy. It's illegal for you and me to kill a business rival.
It is absolutely legal for the state to do all these things.
Why balk at the last, while accepting the others?