Is it true that no person can be found guilty of a crime and punished without due process of law or fair treatment under the law?

Yes, it is true that no person should be found guilty of a crime and punished without due process of law. Due process ensures that individuals receive fair treatment through the judicial system, including the right to a fair trial, legal representation, and the opportunity to present a defense. This principle is a fundamental aspect of legal systems in many democratic countries, aimed at protecting individual rights and preventing arbitrary or unjust punishment.