2 Samuel 11 - 13

For as noble and courageous as David was, he was not immune from succumbing to temptation.  He falls to the temptation of adultery, and uses his position as king to commit murder to try to hide the evidence.  David is confronted by God's messenger and confesses to the sin.  The sin, though confessed, still spawns severe consequences.  The child dies, another of David's children commits incest and is killed by a half-sibling in revenge.  The sibling guilty of murder then flees to avoid further retribution.  David's family pays a high price for his sin.