This problem-based textbook creates for law students the experience that lawyers have when analyzing the constitutional issues involved in the investigatory phase of a criminal case. The problem approach engages students with the complex constitutional materials and enhances learning by offering the professor and the students the opportunity to apply the case law that is presented in each chapter. Each chapter begins with a layered, multi-issue problem presented in the form of a memo to a law clerk working in a variety of settings. The problem is followed by the relevant body of constitutional law edited to provide manageable material for law students, and includes many notes offering direction to the students as they develop analytical skills. To assist professors in teaching how to analyze the problems, the accompanying Teacher's Manual includes a detailed outline of an analysis of each problem in the casebook.