Police oversight agencies are citizens' watchdog organizations designed to ensure that the police are operating with integrity and accountability. Integrity is defined as the quality of being honest and morally upright. Accountability refers to situations in which someone is required or expected to justify actions or decisions. Based on integrity and accountability challenges in police forces all over the world, this book discusses the roles and methods of police oversight agencies. Knowledge management in police oversight is presented by identifying knowledge categories and knowledge management systems. A model for police oversight performance is developed in the book, and the model is applied to an oversight agency as a case study.