Police are using information from Mollie Tibbetts' phone and fitbit to help piece together a timeline from the night she went missing.
The Iowa college student had returned home she shared with her boyfriend to do homework on the night she vanished, according to her family. Her boyfriend has been ruled out as a suspect in her disappearance, as police say he was over 100 miles away working a construction job at the time of her disappearance.
Her mysterious disappearance is shocking the small town of Brooklyn.
Tibbetts was last seen on an evening jog on July 18. She was reported missing when she failed to show up at work the following day.