Upon verified complaint by an employee or former employee that an employer has violated the provisions of Section 197.5 of this title by failure to pay the minimum wage thereby established, the Commissioner, or his authorized representative, is hereby empowered to make such investigation as deemed necessary to ascertain the facts concerning such charge. The Commissioner shall have the power to administer oaths and affirmations, require sworn statements, certify to official acts, and issue subpoenas to compel the attendance of witnesses and the production of books, papers, correspondence memoranda, and other records deemed necessary as evidence in connection with the investigation of any alleged violation of Section 197.5 of this title. All information obtained by the Commissioner, or his duly-authorized representatives, shall be confidential and, except for the finding of the need for additional wages, as provided by Section 197.8 of this title, and information which is necessarily disclosed in court proceedings provided by Section 197.9 or 197.10 of this title, such information shall not be disclosed to any person.