The director or the director's designated representative may investigate and gather data pertinent to matters that may aid in carrying out the provisions of this article. In any case where a complaint has been filed with the director or the director's designated representative regarding a violation of this article, or where the director has reasonable grounds to believe that a field labor contractor has violated provisions of this article, the director or the director's designated representative may investigate and issue subpoenas as provided by section 8-4-112 requiring the attendance and testimony of any witness or the production of any evidence in connection with such investigation.