No witness in any preliminary hearing or in any criminal judicial proceeding of any kind or nature shall be examined or cross-examined by any examiner, solicitor, lawyer or prosecuting officer concerning a written statement formerly made and given to any person employed by this State, or any county, city or municipality thereof, or any part of any such governing body, unless it first be shown that at the time of the making of the statement the witness was given an exact copy of the statement, and that before his examination or cross-examination the witness was given a copy of the statement and allowed a reasonable time in which to read it.