Art. 797.  Challenge for cause

The state or the defendant may challenge a juror for cause on the ground that:

(1)  The juror lacks a qualification required by law;

(2)  The juror is not impartial, whatever the cause of his partiality.  An opinion or impression as to the guilt or innocence of the defendant shall not of itself be sufficient ground of challenge to a juror, if he declares, and the court is satisfied, that he can render an impartial verdict according to the law and the evidence;

(3)  The relationship, whether by blood, marriage, employment, friendship, or enmity between the juror and the defendant, the person injured by the offense, the district attorney, or defense counsel, is such that it is reasonable to conclude that it would influence the juror in arriving at a verdict;

(4)  The juror will not accept the law as given to him by the court; or

(5)  The juror served on the grand jury that found the indictment, or on a petit jury that once tried the defendant for the same or any other offense.