Abstract This chapter discusses the subjects of criminal and civil law, including their definitions and differences. Facts are addressed regarding laws and different levels of the U.S. government. Students will gain insight into the process of the courts and what happens if a person is charged with a crime. Overall, this information will make a security officer well rounded and informed when dealing with legal matters. Readers will learn the definition of a tort and what is meant by a preponderance of the evidence. Vicarious liability and the four elements of negligence are discussed. Students are introduced to selected sections of the U.S. Constitution. Significant articles and amendments are addressed to give each reader a sense of our rights as Americans.