Also not a lawyer, but there is a significant motivation for protection when an incorrect accusation is made in good faith, because a lot of correct reports of

Also not a lawyer, but there is a significant motivation for protection when an incorrect accusation is made in good faith, because a lot of correct reports of child abuse are based on circumstantial evidence and suspicion - so you would need very clear strong evidence that the reporter knew the information was false and was intentionally misleading CPS, or you’d be thrown out of court immediately. In some places you wouldn’t even be given the identity of the reporter.