(30 ILCS 545/4) (from Ch. 127, par. 132.54)
    Sec. 4. It shall be the duty of the State's attorney of the county in which such complaint and affidavits are filed, to present the same to the grand jury, next constituted for such court after the filing thereof, and if said grand jury shall indict the person or persons so complained of it shall further be the duty of said State's attorney to prosecute and try the alleged offender or offenders.
(Source: Laws 1933, p. 475.)