The Mayor or the Council may without notice cause the affairs of any department or the conduct of any officer or employee of the City to be examined and investigated. In the course of such investigation the Mayor or the President of Council shall have the power to subpoena witnesses and the production of evidence, to receive testimony and other evidence, and to administer oaths. The findings of such investigations shall be entered upon the Council journal and reported to the proper officers of the City or the State for appropriate action as ordered by the Council.