(CNN) -- Police in an Indiana city were hoping the "America's Most Wanted" television program that aired Saturday night would bring tips that could help solve the disappearance of a college student.
Bloomington Police Capt. Joe Qualters declined Saturday to discuss specifics, but told reporters evidence was still being gathered in Indiana University student Lauren Spierer's June 3 disappearance.
Police are reviewing videotapes from local businesses and speaking with persons of interest.
Qualters cautioned that the term "person of interest" does not equate to a suspect in the woman's disappearance.
Spierer, 20, was last seen leaving an apartment building a few blocks from her home about 4:30 a.m., according to police.
Police have confirmed through security camera video that she returned from Kilroy's Sports Bar in Bloomington to her building at Smallwood Plaza briefly about 2:40 a.m. with someone, but they left about 10 minutes later.
Police revealed Thursday that they now have additional video footage of Spierer and the other person "making their way" from Smallwood to the building where she was last seen.
An attorney representing the man who was with Spierer at the time told the Journal News of Westchester County, New York, that somebody punched his client in the face during a confrontation at Smallwood. Attorney Carl Salzmann reportedly claimed that his client has no memory of the rest of the night after that or the 15 minutes leading up to it.
According to the Journal News, Salzmann said that Spierer helped his client home after that incident and that he was not the last person to see her that night.
Salzmann's client told CNN Indianapolis affiliate WTHR that he submitted a DNA sample, but had nothing to do with the disappearance. WTHR said police have 10 persons of interest.
Police have said that Spierer was not involved in any altercation.
Spierer's case is generating significant attention on social media websites Twitter and Facebook as members try to spread the word about her disappearance. The Spierer family is offering a $100,000 reward for information.
Lauren's father, Robert Spierer, thanked volunteers and police for their help in the search.
"The strength of others is part of what helps us get through every single day," he said Saturday.
The student's mother, Charlene said, "somebody knows where she is."
Robert Spierer asked anyone with information to contact Bloomington police at 812-339-4477.