Section 360.15. Trial jury; challenge to the panel

1.   A challenge to the panel is an objection made to the entire panel
  of prospective trial jurors returned for the trial of the action and may
  be taken to such panel or to any additional panel that may be ordered by
  the court.  Such a challenge may be made only by the defendant and  only
  on the ground that there has been such a departure from the requirements
  of  the  appropriate  law  in  the  drawing or return of the panel as to
  result in substantial prejudice to the defendant.
    2.  A challenge to the panel must be made before the selection of  the
  jury commences, and, if it is not, such challenge is deemed to have been
  waived.   Such challenge must be made in writing setting forth the facts
  constituting the ground of challenge.  If such facts are denied  by  the
  people,  witnesses  may  be  called  and examined by either party.   All
  issues of fact and questions of law arising on  the  challenge  must  be
  tried  and  determined  by  the  court.   If a challenge to the panel is
  allowed, the court must discharge that panel and  order  the  return  of
  another panel of prospective trial jurors.