This book begins with three interrelated chapters that are designed as an extended introduction to the study of both the criminal justice system and criminal procedure. These chapters will vary in utility depending on an instructor's predilections and the points at which this course is offered in the curriculum. Chapter 1 presents an overview of the criminal process and traces a hypothetical case through it, demonstrating en route the potential each phase of the process possesses to generate serious and complex legal issues. Chapter 2 is a selection of readings from the literature on the criminal process that is designed to acquaint the student with a variety of perspectives on the criminal justice system. Chapter 3 is a brief treatment of the nature of Supreme Court decision making. There are two overriding themes of this book. The first is the evolving significance of the assistance of counsel, which is treated in Part II. The second theme is an examination of the relationship between the government and the citizen, which is treated in Part III and involves an inquiry into the fourth and fifth amendments. That inquiry has its intellectual roots in the remarkable case of Boyd v. United States, and the rise and fall of Boyd is examined in Chapter 6.