Cal. Penal Code § 924.6

If no indictment is returned, the court that impaneled the grand jury shall, upon application of either party, order disclosure of all or part of the testimony of a witness before the grand jury to a defendant and the prosecutor in connection with any pending or subsequent criminal prodeeding before any court if the court finds following an in camera hearing, which shall include the court’s review of the grand jury’s testimony, that the testimony is relevant, and appears to be admissible.