For the first time in the search for Mollie Tibbetts - investigators are giving clues to help people who might know, or even live with, the person who possibly abducted or harmed the mssing University of Iowa student. The Iowa Division of Criminal Investigation says suspicious behaviors may include suddenly cleaning or selling a car; changing hairstyle or facial hair; missing work or school especially around July 18 and 19; and personality changes like nervousness or irritability could identify the suspect. The 20-year-old Tibbetts vanished after jogging in Brooklyn, Iowa the evening of July 18.