Personal data concerning persons who are the subject of proceedings to investigate the causes of death or disappearance are deleted once the investigation has made it possible to find the missing person or to rule out any suspicion of a crime or offence. Once the perpetrator has been finally convicted, the persons mentioned in 2°, 3° and 4° of Article 230-13 may request the deletion of data recorded in the processing, unless the public prosecutor or magistrate mentioned in l’article 230-9 prescribes its retention on grounds relating to the purpose of the processing, in which case these grounds are mentioned.