Book excerpt: Learning Criminal Procedure: Investigations teaches students the law that governs the investigation of criminal cases. The book presents the legal rules directly in plain language. Each topic includes a clear, straightforward description of the binding legal rules, illustrations of how the rules are applied using examples and summaries of cases, and longer excerpts of the leading Supreme Court cases. The book highlights evolving or ambiguous areas of the law, and provides scores of review questions so that students can test their mastery of each issue. The book's authors build on their combined decades of practical experience to explain the law in plain language and explore the policy justifications behind the rules.