Drawing and qualifying trial jury.

The district court of each county shall maintain a list of the names of the jurors duly empaneled and present for the trial of a case. The judge shall cause the names to be randomly selected until sufficient names have been drawn to provide the number of jurors required for the trial. The name and number of each juror shall be announced. Twelve or six jurors shall compose a petit jury in the district courts for the trial of civil causes. Twelve jurors shall compose a petit jury in criminal and children's court cases. Magistrate and metropolitan jury court selection shall be conducted in accordance with supreme court rules.