Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
These school officials are so paranoid because they are mandatory reporters and when they receive the slightest complaint of possible abuse they go overboard. If there is no physical abuse
and if there is no neglect, they have nothing, they are grasping at straws. If they send in CPS, those social workers are absolutely the most incompetent, negligent and abusive people that you could ever encounter. They play friendly, then they make up lies and fabricate evidence to substantiate their own warped ideas.
So, if CPS comes, unfortunately because of their power and authority you need to speak to them and cooperate, BUT legally you do not have to allow them to search your home without a warrant and you do not have to allow them into your home without a warrant (the problem with that is if you refuse to allow them in they will lie and get the police and say your children are in danger, which is cause for them to enter without a warrant and possibly even temporarily take the children from you).
There is no easy way to deal with CPS if they show up other than refuse to sign anything, but be polite and cooperative to a point. Answer their questions with direct and short answers, do not elaborate to give them any words to twist on you. If at all possible, you should engage an attorney to represent you in your dealings with them, even if you never did anything at all, because as I said their social workers are incompetent and vindictive and have their own agenda, just like those school mall cops that your daughter encountered, they are looking to make a case where none exists because it is easier for them than going after true abuse cases.
If there are no issues, then be polite, very brief and direct in your replies and do not sign anything they ask you to sign, they are not to be trusted.