Mosiah 29:28
The system of judges is set up so that it can deal with or compensate for a poor judgment or a wicked judge. If a judge is not judging according to the laws, the people have the option to request that the judge be judged by a higher judge. If a higher judge does not pass righteous judgment, the people can have a small number of their lower judges gather to judge the higher judge according to the voice of the people. I believe that means that based on the voice of the people and the judgments of the higher judge, the lower judges make their judgment of the higher judge.