As used in this article, the term “child abuse or neglect” includes physical injury or death inflicted by other than accidental means upon a child by another person, sexual abuse as defined in Section 11165.1, neglect as defined in Section 11165.2, the willful harming or injuring of a child or the endangering of the person or health of a child, as defined in Section 11165.3, and unlawful corporal punishment or injury as defined in Section 11165.4. “Child abuse or neglect” does not include a mutual affray between minors. “Child abuse or neglect” does not include

an injury caused by reasonable and necessary force used by a peace officer acting within the course and scope of his or her employment as a peace officer.