Abstract: The personnel of official law enforcement agencies such as the Nigeria police have authorities and responsibilities that other public personnel do not. These are important powers that limit civil liberties, such as stopping, searching, asking for identification, confiscation, apprehending, using force, and interrogation. The performance of these duties has significant effects on people’s quality of life, and especially on civil liberties and social life. Taking into account the degree of discretion allowed to security personnel to enforce the law, it becomes clear that there is a need for a code of professional ethics, in addition to existing legislation, in order to increase the quality of the service they provide. The paper therefore, looks at the ethical practice of the security personnel using Nigeria police Force as a case study.