The Attorney General may proceed in an action for discovery and investigation by the state or by any parish, municipal or political corporation, board, commission or public body created by or under the constitution or laws of this state. He may instruct any district attorney to proceed in such action by any parish, political corporation, board, commission or public body of which he is by law the legal adviser. He may instruct the attorney of any municipal corporation to proceed in such an action by the municipal corporation. In his discretion, he may associate himself as attorney in such action, or supersede a district attorney or attorney for a municipal corporation.
La. R.S. § 13:4862