When the requirements of an investigation or information concerning one of the crimes provided for in article 706-55 require it, the public prosecutor or, after receiving the opinion of this magistrate, the investigating judge, may request the department that manages the file to compare the genetic fingerprint recorded in the file, established on the basis of a biological trace from an unknown person, with the genetic fingerprints of the persons mentioned in the first and second paragraphs of Article 706-54 for the purpose of searching for persons who may be related in the direct line to this unknown person.
The number and nature of the non-coding DNA segments required for this comparison to be carried out are set by order of the Minister of Justice and the Minister of the Interior.