Grand Jury Proceedings — California Penal Code — Powers And Duties Of Grand Jury — Conduct Of Investigations — Indictment Date: 15 Sep 2016 TEXT PDF Current through the 2016 Legislative Session The grand jury shall find an indictment when all the evidence before it, taken together, if unexplained or uncontradicted, would, in its judgment, warrant a conviction by a trial jury. Ca. Pen. Code § 939.8