Despite a decade of reform, Indonesia’s police continue to be plagued by systemic corruption. This article examines the reasons for the persistence of police corruption by firstly establishing that corruption is rife and then discuses Indonesian police reform post-Suharto. The international understandings are explored with a view to developing a definition of police corruption that accounts for sociocultural and historical factors in Indonesia. There is an examination of the relevance of international theories of police corruption for Indonesia. It is argued that these theories are only partially applicable to Indonesia and the authors posit the ‘cultural constraints theory of police corruption’, which accounts for invitational, slippery slope, noble cause, and predatory theories, but recognizes the distinct nature of Indonesia.