Lauren Spierer Update: Parents of missing Indiana University student mark daughter's 22nd birthday

Lauren Spierer
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Lauren Spierer disappeared on June 3, 2011 after a night out with friends in Bloomington, Indiana where she went to school.
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(CBS) BLOOMINGTON, Ind. - The parents of Lauren Spierer, a missing Indiana University college student from Westchester County, N.Y., are marking their daughter's 22nd birthday with a plea for information that might help them find her, CBS New York reports. 

PICTURES: Lauren Spierer

Spierer has been missing for more than 18 months. She disappeared on June 3, 2011 after a night out with friends in Bloomington, Ind., where she went to school.

She left without her shoes or cell phone and was later seen on surveillance video stumbling out of an elevator at her apartment. She was last seen wearing black pants and a white top, CBS New York reports.

"Today is Lauren's birthday. There will be no gifts mailed to Bloomington, no cake, no candles, no excited anticipation as the celebration of one so loved approaches. We are left only with the gifts the person responsible for Lauren's disappearance has given our family, despair, heartache and loss," Lauren's parents, Robert and Charlene Spierer, posted on their website Thursday.

Months of searches following her disappearance turned up nothing and no arrests have been made. According to CBS New York, police say they have received more than 2,400 tips in the case.

Last year, the Spierers said they realize their daughter is likely dead, but said they will never give up trying to find her.

Anyone with information regarding the disappearance should contact Beau Dietl Associates at 1-800-777-9366, or the Bloomington Police Department at (812)339-4477.

For more information, visit the family's website

Complete Coverage of Lauren Spierer on Crimesider