BLOOMINGTON, Ind. -- Investigators believe they've found evidence that may help them locate missing IU student Jill Behrman.

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Possible Clues Found

Behrman (pictured, left) disappeared at age 19 while on a bike ride on May 31, 2000. Her bicycle was found along a roadside northwest of Bloomington, but no trace of her has ever been found.

Two dams were built in Salt Creek earlier this week to drain water away from the location where investigators believe her body is located, RTV6's Chris Bavender reported.

FBI officials won't say what they found, but called the possible evidence "encouraging."

"We've been very fortunate today," FBI spokesman Gary Dunn said. "We found additional items -- potential evidentiary value that we've seized (and) collected, and we're certainly going to evaluate and forensically examine."

Eight inches of water an hour and close to 22,000 gallons a minute are being drained from the North Fork of Salt Creek, Bavender reported. The creek level is down around 23 feet from when work began earlier in the week.

"We're going to de-water this, and we're going to search this better than it's ever been searched," Dunn said. "We're primarily conducting visual searches, both from the water, canoes from the conservation officers and also dog teams that we've had down here."

Officials have not set a deadline for an end to the search, Bavender reported.

Investigators hope the water will be fully drained Monday so police can begin to comb the creek bottom.