Senior police officer performing duties of a subordinate police officer.

A senior police officer may perform any duty assigned by law or by a lawful order to any other subordinate to him, and in case of any duty imposed on such subordinate, a superior officer may aid, supplement, supersede, or prevent any action of such subordinate by his own action or that of any person lawfully acting under his command or authority, whenever the same shall appear necessary or expedient for giving more complete or convenient effect to the law or for avoiding any infringement thereof.