905.18 Duty of court.—When requested, the court shall advise the grand jury about its legal duties. In its original charge or thereafter the court shall not restrict an investigation of any matter into which the grand jury is by law entitled to inquire.History.—s. 97, ch. 19554, 1939; CGL 1940 Supp. 8663(97); s. 55, ch. 70-339.