GAINESVILLE, Fla. -- When missing person Tiffany Sessions disappeared from Gainesville without a trace 20 years ago, there was no Amber Alert, no Web sites displaying pictures of missing kids, and no social media to spread the word across the country with a few keystrokes.

Tiffany Sessions is still missing, her case is still open, and her father -- Miami-based real estate developer-turned missing-children advocate Patrick Sessions -- is leveraging social media tools to help police find missing children and especially the daughter he last saw when she was 19-year-old student at the University of Florida.

Tiffany, who would now be 40, went out for a jog on the evening of Feb. 9, 1989 and never returned. Her father was joined by 1,000 people in a search the first week after she disappeared.

Refusing to give up on his daughter, Sessions is launching the Official Tiffany Sessions Web site, and investigators said they have developed new leads.

"This is still a viable case with several new leads being developed and explored," said Alachua County Sheriff Sadie Darnell, who was Gainesville Police Department's public spokesperson when the UF coed disappeared in 1989. "This 20-year anniversary of Tiffany's disappearance is a time to remember and recommit ourselves to resolving as many unsolved missing persons and murder cases as possible."

A $25,000 reward is being offered by the Sessions family for information leading to the remains of Tiffany Sessions and the arrest and conviction of the person or persons responsible for her abduction.

"There was no Facebook when Tiffany was in college. No cell phones to trace her whereabouts. No MySpace pages to investigate," Sessions said. "I am launching this Web site in hopes that someone out there knows where Tiffany is or can offer new leads that will help us find her. We believe social media can play a vital role in finding missing children everywhere, including Tiffany."

In addition to serving as a vital resource for Tiffany's case, the Web site will also act as a resource for other parents and friends coping with the disappearance of a loved one by providing phone numbers and links to missing persons organizations.