Authorities: Mollie Tibbetts killed by Mexican in US illegally

MONTEZUMA, Iowa — A man from Mexico living in the U.S. illegally has confessed to kidnapping college student Mollie Tibbetts while she was running in her small Iowa hometown, killing her and dumping her body in a cornfield, authorities said Tuesday.Cristhian Bahena Rivera, 24, was arrested and charged with first-degree murder in the death of Tibbetts, whose July 18 disappearance set off a massive search involving state and federal authorities.Rivera led investigators early Tuesday to a bod