55 ILCS 5/3-3029

If any witness shall refuse to enter into such recognizance, it shall be the duty of the coroner to commit the witness so refusing to the common jail of the county, there to remain until discharged according to law; and the coroner shall carefully seal up and return to the clerk of the court the verdict of the jury, and the recognizances, and it shall be the duty of the clerk to carefully file and preserve the same.