False Reporting
Penal Code § 11172(a)

Any person reporting a known or suspected instance of child abuse or neglect shall not incur civil or criminal liability as a result of any report unless it can be proven that a false report was made and the person knew that the report was false or was made with reckless disregard of the truth or falsity of the report.

Any person who makes a report of child abuse or neglect known to be false or with reckless disregard of the truth or falsity of the report is liable for any damages caused.