Mastering Criminal Procedure, Volume 1: The Investigative Stage provides a concise treatment of the relevant federal constitutional doctrines that guide and constrain interactions between the police and individuals in the investigation of criminal conduct. The book provides an overview of the criminal process and the constitutional sources of the criminal procedure rules, including different approaches to constitutional interpretation. The third edition of Volume One focuses on the Fourth, Fifth, and Sixth Amendments as they relate to the warrant requirement for searches, exceptions that allow warrantless searches, the seizure of evidence and individuals, and the interrogation of suspects.