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What does it take to solve a cold case?

University of Florida student Tiffany Sessions vanished in Gainesville in 1989. Sessions spent her teenage years in Valrico, where her mother still lives.

On Monday night, 48 Hours brings you the inside story of how her determined parents and a dedicated sheriff's office came together to solve one of Florida's most famous missing person's cases.

Watch "48 Hours" on 10 News, Monday night at 10 p.m.

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