Search crews said they found a lunchbox that belongs to 20-year-old Holly Bobo.
The nursing student was last seen by her brother early Wednesday morning who only saw the man from behind and believed it was Bobo's boyfriend. Tennessee Bureau of Investigation Special Agent John Mehr said authorities do not believe she went willingly.
Bobo was on her way to campus to take a test when she was taken.
Search crews also found duct tape with blond hair on it. However, police won't say if it's related to the case.
Hundreds of volunteers and friends showed up to help in Saturday's search.
Bobo's cousin, country music singer Whitney Duncan tried to provide searchers with some hope.
He tweeted "I can't thank you all enough for all the efforts to find Holly. Keep it up until she is home with us."
The Associated Press contributed to this report.