We don't trust judges. We trust the process they follow. A judge is not a God, why we have a hierarchy to redo judgments (lift a decision to a higher court).

Also, IMHO judging a person for something they did not do is amongst the worst things that can happen in a society. This is also why there is a principle of rather letting 10 guilty people go free rather than convicting a single innocent person.

(i am speaking from a Scandinavian juris system)