This document outlines the main forms of law and sources of criminal law. It discusses how civil law governs relationships between individuals and corporations through cases involving malpractice, ownership disputes, and contracts. Criminal law involves felonies for serious crimes punishable by prison time or death, and misdemeanors for less serious crimes resulting in jail time. The sources of criminal law include constitutional law as the highest law, statutory law enacted by legislatures, administrative law in the form of agency rules and regulations, and case law made through court interpretations of other laws. Laws are subject to change over time as social norms evolve.