Among the volunteers is a father who knows Robert Spierer's pain all too well. Lauren isn't the first Indiana University student to go missing. In 2000, 19-year-old Jill Behrman disappeared while on a bike ride. Behrman's father, Eric Behrman, has been helping search for Spierer. His daughter's skeletal remains were found three years later and John R. Myers II was charged later that year in her death. He's serving a 65-year sentence in her death.
Robert Spierer said that he and his wife will meet with the mayor of Bloomington and president of Indiana University to discuss the search today. The family is also meeting with police this morning to learn the latest on their investigation.
"Lauren is a beautiful, wonderful girl," said Charlene Spierer. "To that one person, the one person that has the answer to this mystery and this puzzle, bring Lauren back. Let us know where she is. Take her to a hospital. Let us have her back."
She was last seen wearing long, back stretch pants, a white shirt, and no shoes. A website in Indiana has been set up to organize volunteers and the family is asking that any tip be reported to the Bloomington Police Department at (812) 339-4477.
ABC News' Christina Ng and the Associated Press contributed to this report.