You are assuming that Randland has a criminal justice system comparable to the U.S. where it is based on trial by combat, only the combat is verbal. Your champion in this system is your lawyer. They fight for you, and the outcome of the "fight" determines whether you are guilty or not guilty of the crime.

This system does not determine innocence, however. That is a common misconseption. There is a difference between being Innocent and the verdict of Not Guilty. That verdict simply means that there is a reasonable doubt about whether or not the accused committed the crime. If there is a reasonable doubt, a verdict of Not Guilty must be returned. This does not mean that the accused is innocent. It just means that the system in place cannot punish the accused, because they are unable to prove that the crime was committed by the accused.

I have seen very little evidence that this system of criminal justice is in place in Randland. You can't assume that people in other cultures have the same customs and systems in place as you do. To do so is both arrogant and also rather rude.