You probably heard about justice Scalia of the American supreme court saying executing an innocent man is not unlawful because he was found guilty in a legal trial. New findings which can acquit said innocent man, are, for justice Scalia, no reason not not proceed with what a court has found to be just.
That may sound strange, even scary coming from a supreme court justice. The thing is, I have seen this kind of thinking before from people who give service to society. Sometimes they seem to loose sight of what is actually the grand reason for them being there. They stop seeing their system as a system that gives service to society, but that society is there so obey their wonderful system.
This I believe is exactly what happened to justice Scalia. He lost sight of the reason he is there. To serve society. Executing an innocent man does not do that in any way. Look at it from the other direction, and you can see how he reasons.
One must ask himself if someone who completely lost sight of what its all about could, or should, remain in his position.
For more information on this case read this.