Investigations: 150 Things You Should Know, Second Edition, explores the essential tips and techniques for security investigations, providing a useful reference for those at any stage of their security career. This practical guide covers the legal guidelines that all investigators must follow. Through anecdotes, case studies and documented procedures, the authors present the most complete collection of investigative information available. Readers in the security and law enforcement fields will find this book easy to use and understand when seeking explanations about a wide variety of investigative topics, including constitutional law, documentary evidence, surveillance equipment, interviewing, interrogating and reporting.