MARION, Ill. (AP) — A southern Illinois doctor who works at a clinic where many patients try to access the state’s medical marijuana program has been subpoenaed in a state and federal investigation.

State officials told the Southern Illinoisan that the investigation is in response to alleged improper controlled substance prescriptions from Dr. Bodo Schneider.

Schneider is the medical director clinics in Marion and Orland Park. He has said he has followed all of the state’s rules for the program.

Illinois Department of Professional and Financial Regulation spokesman Terry Horstman says the terms of the subpoena require Schneider to provide medical records to the state regulatory agency by Oct. 7.

Another status hearing in the case is scheduled for Oct. 24.