Mollie Tibbetts' Body Found, Undocumented Immigrant Arrested as Suspect 24-year-old Christian Rivera led authorities to the body of 20-year-old Mollie Tibbetts on Tuesday. Although the body recovered <br />from the farm field in rural Iowa <br />has not yet been identified, it is believed to be that of Tibbetts. Rivera, an undocumented immigrant, <br />has been charged with first-degree murder. Tibbets was a <br />20-year-old sophomore Her case has sparked <br />national headlines <br />for several weeks. Rivera came to the attention of authorities after his car was identified on the security camera footage of a local resident in Brooklyn, IA, the area where Tibbetts went missing. Rick Rahn, Iowa Criminal Investigation, via Yahoo News Rivera told authorities he saw <br />Tibbetts running while he was driving, <br />got out of his car and began to run next to her. When she threatened <br />to call the police, <br />Rivera says he got mad <br />and blacked out. He claims he realized that Tibbetts was in his trunk moments later after he had driven to a cornfield. When he saw blood <br />on the side of her head,