Friends and authorities are searching for an Iowa college student who vanished last week. Mollie Tibbetts, a 20-year-old University of Iowa student, was last heard from on July 18. Authorities are checking wooded areas and bodies of water around the town of Brooklyn, Iowa, where Mollie lived. They're also combing her laptop and social media accounts for clues. "Everything's on the table, unfortunately," Poweshiek County Sheriff Thomas Kriegel told KCCI.