If any such warrant be executed by the seizure of property, or of any other of the things aforesaid, the same shall be safely kept by the direction of such judge or court, to be used as evidence, and thereafter be disposed of as provided by law; provided, however, that any such property seized under such warrant which is not used in evidence and any property which is stolen or embezzled property shall be restored to its owner, and the things mentioned in § 19.2-53 may be burnt or otherwise destroyed, under such direction, as soon as there is no further need for its use as evidence unless it is otherwise expressly provided by law.