A comprehensive, easy to understand, legal reference for Massachusetts Law Enforcement professionals. Four books in one. Part one covers criminal procedure (search & seizure, arrest powers, interrogation, vehicle stops and much more); part 2 covers the relevant criminal laws, the required elements for a conviction and related case law; part 3 covers juvenile issues; part 4 covers the various motor vehicle laws and rules that all police officers must be familiar with. A perfect, comprehensive, reference manual for law enforcement professionals.