They would get away with nothing. In the life review, all the events of your life are played back to you, but with an interesting difference. You are able to experience the feelings your actions caused in others. If you harmed someone, you will feel the pain that they felt as you harmed them. If you helped someone, you will experience the gratitude they felt for your help.
Nothing is left out, nothing is missed.
You are the judge of how much or how little you accomplished. God does not judge. God does not punish. This life review is a teaching tool for you to measure your growth. The second indication is often known as reincarnation.