905.06 How challenge made and tried.—Challenges to an individual grand juror or to the panel shall be tried by the court. A challenge to an individual grand juror may be oral, but a challenge to the panel shall be in writing.History.—s. 85, ch. 19554, 1939; CGL 1940 Supp. 8663(85); s. 45, ch. 70-339.