The Attorney General shall investigate suspected criminal violations of this subtitle and may require assistance from any State’s Attorney for that purpose. The Attorney General shall commence and try all prosecutions under this subtitle with the State’s Attorney for the county where the prosecution is brought. With respect to the commencement and trial of the prosecution, the Attorney General has all the powers and duties vested by law in State’s Attorneys with respect to criminal prosecutions. A prosecution for any offense in violation of this subtitle shall be commenced within four years after the offense is committed.