A unique insight into the hidden world of informers and related aspects of covert and undercover policing. Edited by Roger Billingsley, head of the Covert Policing Standards Unit at New Scotland Yard, this book is the first to look behind the scenes of this kind of police work since the authorities relaxed the rules on restricted information. Contents: Covert Human Intelligence Sources (CHIS) covers such key matters as: What is meant by CHIS; The legal framework; The Regulation of Investigatory Powers Act 2000 (RIPA); Inherent powers and the position at Common Law; 'Informers' and 'informants'; Working methods and oversight; Handlers, controllers and authorising officers; Dangers and risks; Human rights, proportionality and 'necessity'; Corruption and 'noble cause corruption'; Protection and the duty of care; Motives of informers; Official participation in crime: how far is it lawful?; Undercover officers: strains, duties and requirements; Records and management of information;