Mickey Shunick: Missing Student's Bike Found Under Bridge

"We're hoping for the best," Tim Miller of Equusearch said. "We don't sugarcoat anything. It does not look good, doesn't look good at all, but we believe in miracles."

Wilson, the last person to see her the night she vanished, has turned to the Web with his plea for assistance in the search. He has posted a YouTube clip seeking help via social media.

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"This is the power of social media ... To bring back somebody, and end a family's heartbreak … You have the chance to extend the information about this young woman to everyone you know," Wilson says in the clip.

Friends and family held a candle light vigil Tuesday night, and announced a reward for tips leading to her whereabouts. Searches by K-9 units, police and volunteers have turned up no hints of what happened, but her family remains hopeful.

A benefit concert occurred this weekend to increase the $25,000 reward for information on what happened to Shunick.

Shunick is 5-foot-1 and 115 pounds. She was last seen wearing a pastel multi-colored striped shirt, light-wash skinny jeans and gray shoes.