Missing college student Mollie Tibbetts had returned to an Iowa house to homework on the night she vanished, according to her family. The new information is helping police build a timeline in regard to her mysterious disappearance in the quaint small town of Brooklyn. Tibbetts was last seen on an afternoon jog on July 18. She was reported missing when she failed to show up at work the following day. Her boyfriend has been ruled out as a suspect in her disappearance.