§ 132.210 Immunity of jurors as to official conduct

If you serve on a grand jury, you're protected from being questioned about what you said or how you voted during your official duties. This means once you're done deliberating and voting on a case, no one can come after you later and ask you to explain or defend your reasoning, your comments, or your vote.

There's only one exception. If a grand juror lies under oath while testifying as a witness before the grand jury, that person can still be held responsible for perjury or false swearing. So the protection covers your role as a decision maker on the jury, but it doesn't cover you if you lie while giving testimony as a witness.

This rule exists to let grand jurors speak freely and vote based on their honest judgment, without fear that they'll be dragged into court later to defend their private deliberations.