The board and its members and officers shall assist prosecuting officers in the enforcement of this chapter, and it shall be the duty of the board, its members and officers to furnish the proper prosecuting officers with such evidence as it or they may ascertain to assist them in the prosecution of any violation of this chapter, and the board is authorized for such purposes to make such reasonable expenditures from the funds of the board as it may deem necessary to ascertain and furnish such evidence. The Attorney General of the state shall be the attorney for the board, but the board may in its discretion employ other counsel. It shall be the duty of the district attorney of the judicial circuit wherein any offense is committed to prosecute violations of this chapter.