The lawyers can be dishonest. There can be witnesses and the witnesses can lie. God wants justice in the world but mankind lack the fear of God. People would not lie and prevent justice, if they fear God.
God is the great judge. The lawyers and false witnesses are accountable to God. The truth need to be in their hearts and words. The world don't understand this principle.
The ordinary person can have this problem. People can tell rumors about other people. There is false reports when people tell rumors. God doesn't like false rumors.
The ordinary person can help the guilty person. If a person did a crime, then their friend help them. The friend tells other this. The person didn't do the crime, then this is not good. Mankind need to be honest.