Miranda Kamille Barbour, the self-proclaimed Satanist who claimed to have killed almost two dozen people, unexpectedly pleaded guilty Tuesday in a Pennsylvania court to second-degree murder in the stabbing death of a man she and her husband lured to his death through an online ad. Her husband, Elytte Randle Barbour, who'd been scheduled to testify against her at trial, also pleaded guilty. Miranda Barbour, 19, and her husband, 22, had pleaded not guilty to criminal homicide, aggravated assault and numerous other charges in the stabbing and strangling of Troy LaFerrara, 42, who was found dead in an alley in November...