Facts101 is your complete guide to Criminal Justice, Mainstream and Crosscurrents. In this book, you will learn topics such as Theories of Crime, Criminal Law, History and Organization of Law Enforcement, and Policing and the Law plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.