DES MOINES, Iowa — A man has been charged with the stabbing and strangulation murder of his two stepdaughters in what police are calling a "spell gone bad" in the family's Sioux City, Iowa, home. Police Lt. Marti Reilly said Harris had been performing "some strange ritual" and told officers he cast a spell that had gone bad. Reilly said he could offer no other details on how the girls were killed.