Article 706-105 of the French Code of Criminal Procedure
When, in the course of the investigation, the provisions of articles 706-80 to 706-95, a person who has been in police custody six months previously and who has not been prosecuted may ask the public prosecutor in whose jurisdiction the police custody took place about the outcome of the investigation or the outcome that may be given. This request is made by registered letter with acknowledgement of receipt. When the…