Okla. Stat. tit. 22, § 22-342: Juror may disclose proceedings, when

A member of the grand jury may, however, be required by any

court to disclose the testimony of a witness examined before the

grand jury for the purpose of ascertaining whether it is consistent

with that given by the witness before the court, or to disclose the

testimony given before them by any person, upon a charge against him

for perjury in giving his testimony or upon his trial therefor.