The two acts represent landmarks in the progressive development of the English criminal justice system. They are intended to strike a balance between powers needed to investigate and prosecute crime effectively and safeguards necessary to protect the civil liberties of suspected persons. The papers examine provisions in the acts and review police practices and criminal procedures in light of the legislation. The focus is on police powers and procedures, policing proprieties, and relations between police officers and the public. The papers discuss the changing context of policing; police powers to stop, search, and arrest; detention and interrogation; prosecution and evidence admissibility; police effectiveness and accountability; and police-community relations. Notes, references, and figures