This brings up another question about David— did he really lose his chance for exaltation after the murder of Uriah (D&C 132:39)?  This is a hard one to understand, but the Old Testament Institute Student Manual quotes Elder Spencer W. Kimball who explained why murder is so unforgivable: “As to crimes for which no adequate restoration is possible, I have suggested … that perhaps the reason murder is an unforgivable sin is that, once having taken a life—whether that life be innocent or reprobate—the life-taker cannot restore it. He may give his own life as payment, but this does not wholly undo the injury done by his crime. He might support the widow and children; he might do many other noble things; but a life is gone and the restitution of it in full is impossible. Repentance in the ordinary sense seems futile.  Murder is so treacherous and so far-reaching! Those who lose their possessions may be able to recover their wealth. Those defamed may still be able to prove themselves above reproach. Even the loss of chastity leaves the soul in mortality with opportunity to recover and repent and to make amends to some degree. But to take a life, whether someone else’s or one’s own, cuts off the victim’s experiences of mortality and thus his opportunity to repent, to keep God’s commandments in this earth life. It interferes with his potential of having ‘glory added upon [his head] for ever and ever.’” (Abraham 3:26.)” (Miracle of Forgiveness, pp. 195–96.)