No person summoned is exempt from jury duty except at the discretion of the coroner. No person shall be summoned as juror who is related to the decedent or is charged with or suspected of the killing, nor shall anyone be summoned who is known to be prejudiced for or against him. No person selected or summoned to appear as a juror is subject to be challenged by any party.
(Added by Stats. 1947, Ch. 424.)