Signature Compounding Pharmacy involved in pending grand jury investigation.

An Orlando pharmacy once accused of providing performance-enhancing drugs to professional athletes across the country remains under federal investigation in Central Florida.

Federal prosecutors in Orlando are asking to review evidence seized as part of a 2007 New York case against Signature Compounding Pharmacy.

Charges against company officials later were tossed, but prosecutors recently filed documents in Orlando federal court that state the evidence is related to a "pending grand jury investigation."

Signature's attorneys long have fought allegations against the pharmacy and have denied the company was a distribution channel for pro athletes who sought performance-enhancing drugs.

Signature made national headlines in 2007 when New York prosecutors painted the company as the hub of a steroid network.

In an investigation dubbed "Operation Which Doctor," authorities raided Signature's two Central Florida offices and arrested its top officers. Eventually, nearly two dozen doctors and clinic operators across the country were indicted.

But in 2008, a judge threw out the New York charges against the Signature's officers and barred prosecutors from seeking further charges.