嘅完全獨立監警部門，你估香港仲淨返幾多個警察？

介紹返Internal Affairs功能先：

The Internal Affairs Division of the National City Police Department is responsible for investigating internal affairs matters such as citizen’s complaints, inquiries, and department initiated investigations. The purpose of the Internal Affairs function is to maintain the integrity of the police department through objective, fair and impartial internal investigations and review to ensure public trust in the police department. In addition, the Internal Affairs Division maintains a close relationship with the National City Community and Police Relations Commission.