LOUISVILLE, Ky. — The attorney for a woman under FBI investigation for an alleged extortion attempt against Louisville coach Rick Pitino says he's never been involved with such an unusual case.

Thomas Clay said Thursday the circumstances surrounding the investigation into Karen Sypher is unprecedented in his 35 years of practicing law, and he's not sure what the future holds.

The details of Sypher's allegations against Pitino have not been revealed, but Sypher has talked to several media outlets about the ordeal while the investigation is ongoing.

Pitino filed a complaint with the FBI last month claiming he was the victim of extortion. The FBI confirmed it was looking into Pitino's complaint, and Clay says Sypher, the wife of Louisville equipment manager Tim Sypher, is the target of the investigation.