Article 706-158 of the French Code of Criminal Procedure
During the investigation in flagrante delicto or the preliminary investigation, the liberty and custody judge, at the request of the public prosecutor, may order by reasoned decision the seizure, at the advanced expense of the Treasury, of property for which confiscation is provided for by the article 131-21 of the Penal Code without divesting the owner or holder thereof. The investigating judge may, during the investigation, order this seizure under…