The Gendarmerie Nationale and the Police Nationale are the national police forces of Chad.
Historical secret police organizations Direction de la Documentation et de la Sécurité (DDS) (Directorate of Documentation and Security)
Secret police organizations Agence nationale de sécurité (ANS) (National Security Agency)
References World Police Encyclopedia, ed. by Dilip K. Das & Michael Palmiotto published by Taylor & Francis. 2004, World Encyclopedia of Police Forces and Correctional Systems, second edition, 2006 by Gale. Sullivan, Larry E. Encyclopedia of Law Enforcement. Thousand Oaks: Sage Publications, 2005.