Courtesy Blair Wallach(NEW YORK) -- The parents of Lauren Spierer, the 20-year-old Indiana University Student missing for five days, are pleading for the safe return of their daughter.

"To the person that has Lauren or that knows where Lauren is, if you have a shred of decency, you have to come forward.  Lauren is a beautiful, wonderful girl," Spierer's mother Charlene said on ABC's Good Morning America Wednesday.

Indiana police believe foul play is involved in the disappearance of the pint-sized student who weighs less than 100 pounds and is 4-foot-11.

Spierer was last seen at about 4:30 a.m. on Friday morning walking to her apartment.  She was last spotted walking barefoot just three blocks from her home.

Surveillance footage from her apartment at Smallwood Plaza shows that she never came home.  Her keys were found a block away from where she was last seen, but there have been no other traces of the missing student.

Since Spierer disappeared, the native New Yorker's family has been in Bloomington, Indiana with hundreds of volunteers combing her college neighborhood.

Bloomington Police served a search warrant at Spierer's apartment complex on Tuesday night.  They seized computers and computer discs that they hope might provide some lead in the student's disappearance.

"We certainly feel like there could be foul play," said Lt. Bill Parker from the Bloomington Police.

Making time even more crucial is Spierer's dangerous heart condition.  She has Long QT Syndrome, an irregular heartbeat.

"What can happen is...your heart doesn't recover quickly enough between beats and you lose oxygen and it can result in your death," said Charlene Spierer.

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