760 ILCS 55/9

The Attorney General may investigate transactions and relationships of trustees subject to this Act for the purpose of determining whether the property held for charitable purposes is properly administered. He may require any agent, trustee, fiduciary, beneficiary, institution, association, or corporation, or other person to appear, at a named time and place, in the county designated by the Attorney General, where the person resides or is found, to give information under oath and to produce books, memoranda, papers, documents of title and evidence of assets, liability, receipts, or disbursements in the possession or control of the person ordered to appear.