071521 404 A prosecutor today has rejected claims that the killing of a University of Iowa student could be connected to sex trafficking and other abductions. Mollie Tibbetts disappeared and was found murdered in rural eastern Iowa in 2018. Cristhian Bahena Rivera was convicted for the murder earlier this year. The 27-year-old dairy farm worker testified that two masked men killed Tibbetts but forced him to dispose of her body. Assistant attorney general Scott Brown says a man’s alleged