Cal. Penal Code § 118.1

Every peace officer who files any report with the agency which employs him or her regarding the commission of any crime or any investigation of any crime, if he or she knowingly and intentionally makes any statement regarding any material matter in the report which the officer knows to be false, whether or not the statement is certified or otherwise expressly reported as true, is guilty of filing a false report punishable by imprisonment in the county jail for up to one year, or in the state prison for one, two, or three years. This section shall not apply to the contents of any statement which the peace officer attributes in the report to any other person.