(725 ILCS 5/112-4) (from Ch. 38, par. 112-4)
    Sec. 112-4. Duties of Grand Jury and State's Attorney.) (a) The Grand Jury shall hear all evidence presented by the State's Attorney.
    (b) The Grand Jury has the right to subpoena and question any person against whom the State's Attorney is seeking a Bill of Indictment, or any other person, and to obtain and examine any documents or transcripts relevant to the matter being prosecuted by the State's Attorney. Prior to the commencement of its duties and, again, before the consideration of each matter or charge before the Grand Jury, the State's Attorney shall inform the Grand Jury of these rights. In cases where the initial charge has been commenced by information or complaint and a finding of no probable cause has resulted as to any offense charged therein, the Grand Jury shall be informed of the finding entered at the preliminary hearing and further advised that such finding shall not bar the State from initiating new charges by indictment, information or complaint if the State's Attorney has reasonable grounds to believe that the evidence available at that time is sufficient to establish probable cause. In such cases, the Grand Jury shall be further advised that it has the right to subpoena and question any witness who testified at the preliminary hearing, or who is believed to have knowledge of such offense, and of its right to obtain and examine the testimony heard at the preliminary hearing, either through the production of a transcript of the proceedings, or through the verbatim testimony of the court reporter who attended the preliminary hearing. The State's Attorney shall file an affidavit as part of the Grand Jury record indicating whether the jurors were advised of such previous findings of no probable cause and of their rights based upon such previous finding.
    Any person subpoenaed who is already charged with an offense or against whom the State's Attorney is seeking a Bill of Indictment shall have the right to be accompanied by counsel who shall advise him of his rights during the proceedings but may not participate in any other way. Before any testimony is given by such a person, he shall be informed that he has the right to refuse to answer any question that will tend to incriminate him, that anything he says may be used against him in a court of law, that he has the right to be accompanied and advised of his rights by counsel, and that he will have counsel appointed for him if he cannot afford one.
    (c) The foreman shall preside over all hearings and swear all witnesses. Except where otherwise provided by this Article, the foreman may delegate duties to other grand jurors and determine rules of procedure.
    (d) If 9 grand jurors concur that the evidence before them constitutes probable cause that a person has committed an offense the State's Attorney shall prepare a Bill of Indictment charging that person with such offense. The foreman shall sign each Bill of Indictment which shall be returned in open court.
    (e) When the evidence presented to the Grand Jury does not warrant the return of a Bill of Indictment, the State's Attorney may prepare a written memorandum to such effect, entitled, "No Bill".
(Source: P.A. 85-690.)