There are many factors that aid justice. Two of them are fairness and the police force. Justice is all about being fair and getting punished, we couldn't find the people doing bad things without the police.
There are also factors that get in the way. Such as prejudice and mercy. Prejudice can cloud peoples sense of right, or other people who have prejudice and can persuade the person on their judgements. Mercy can be a good thing or it can be a bad thing. If someone did something truly terrible it would be terrible if they were let off easy, but if someone did something just to keep living it might be different.
