Cal. Civ. Code § 48.7

(a) No person charged by indictment, information, or other accusatory pleading of child abuse may bring a civil libel or slander action against the minor, the parent or guardian of the minor, or any witness, based upon any statements made by the minor, parent or guardian, or witness which are reasonably believed to be in furtherance of the prosecution of the criminal charges while the charges are pending before a trial court. The charges are not pending within the meaning of this section after dismissal, after pronouncement of judgment, or during an appeal from a judgment.
Any applicable statute of limitations shall be tolled during the period that such charges are pending before a trial court.
(b) Whenever any complaint for libel or slander is filed which is subject to the provisions of this section, no responsive pleading shall be required to be filed until 30 days after the end of the period set forth in subdivision (a).
(c) Every complaint for libel or slander based on a statement that the plaintiff committed an act of child abuse shall state that the complaint is not barred by subdivision (a). A failure to include that statement shall be grounds for a demurrer.
(d) Whenever a demurrer against a complaint for libel or slander is sustained on the basis that the complaint was filed in violation of this section, attorney’s fees and costs shall be awarded to the prevailing party.
(e) Whenever a prosecutor is informed by a minor, parent, guardian, or witness that a complaint against one of those persons has been filed which may be subject to the provisions of this section, the prosecutor shall provide that person with a copy of this section.
(f) As used in this section, child abuse has the meaning set forth in Section 11165 of the Penal Code.