Wash. Rev. Code § 43.10.090
Upon the written request of the governor, the attorney general shall investigate violations of the criminal laws within this state.
If, after such investigation, the attorney general believes that the criminal laws are improperly enforced in any county, and that the prosecuting attorney of the county has failed or neglected to institute and prosecute violations of such criminal laws, either generally or with regard to a specific offense or class of offenses, the attorney general shall direct the prosecuting attorney to take such action in connection with any prosecution as the attorney general determines to be necessary and proper.
If any prosecuting attorney, after the receipt of such instructions from the attorney general, fails or neglects to comply therewith within a reasonable time, the attorney general may initiate and prosecute such criminal actions as he or she shall determine. In connection therewith, the attorney general shall have the same powers as would otherwise be vested in the prosecuting attorney.
From the time the attorney general has initiated or taken over a criminal prosecution, the prosecuting attorney shall not have power or authority to take any legal steps relating to such prosecution, except as authorized or directed by the attorney general.
RCW 43.10.090
Corporations, governor may require attorney general to investigate: RCW 43.06.010.
Prosecuting attorneys, governor may require attorney general to aid: RCW 43.06.010.