Illinois Statutes Chapter 725. Criminal Procedure § 5/109-3. Preliminary examination

(a) The judge shall hold the defendant to answer to the court having jurisdiction of the offense if from the evidence it appears there is probable cause to believe an offense has been committed by the defendant, as provided in Section 109-3.1 of this Code, if the offense is a felony.

(b) If the defendant waives preliminary examination the judge shall hold him to answer and may, or on the demand of the prosecuting attorney shall, cause the witnesses for the State to be examined. After hearing the testimony if it appears that there is not probable cause to believe the defendant guilty of any offense the judge shall discharge him.

(c) During the examination of any witness or when the defendant is making a statement or testifying the judge may and on the request of the defendant or State shall exclude all other witnesses. He may also cause the witnesses to be kept separate and to be prevented from communicating with each other until all are examined.

(d) If the defendant is held to answer the judge may require any material witness for the State or defendant to enter into a written undertaking to appear at the trial. Any witness who refuses to execute a recognizance may be committed by the judge to the custody of the sheriff until trial or further order of the court having jurisdiction of the cause. Any witness who executes a recognizance and fails to comply with its terms commits a Class C misdemeanor.

(e) During preliminary hearing or examination the defendant may move for an order of suppression of evidence pursuant to Section 114-11 or 114-12 of this Act or for other reasons, and may move for dismissal of the charge pursuant to Section 114-1 of this Act or for other reasons.