Hi OP;
I have been in a similar situation before as in the same position as your son so I know how it feels! I would just like to start by saying the people on here who are attacking you and your dear son over a potential false accusation (with unclear details) really need to take a good look at themselves first before attacking complete strangers who they have never met before!
The first thing I would advise you to do is pray about it! That’s what I did and everything has become wayyyyy better since!
Secondly I would advise you to challenge the school and get your son to challenge the school as well. I would advise you use empirical logic to directly challenge their way of thinking and of course their illogical procedure! So I would advise you to ask them questions like how can you exclude my son without any evidence? What evidence have you got? Also it is important to note without any probable reason and without an official physical letter in writing to you; outlining the reasons as to why your son is being excluded; legally speaking they can’t exclude your son as it is illegal for them to do without 1) proper reasoning 2) an official physical letter to you explaining why your son has been excluded. If none have been given to you I would suggest making a formal complaint against this action and against the member of faculty responsible for this action specifically outlining the illegality of the decision to exclude your son without proper reasoning, evidence or the exclusion letter. If this part is true and the school hasn’t provided you with all of these requirements in order to legally exclude your son; contact your local authority (LADO) and make an official complaint with them about the case and see if action can be taken officially. I would also contact OFSTED and if it’s a private school the ISI as well.
Ask the school what part of their exclusion and student discipline policy your sons exclusion relates to and ask them to pinpoint to you what exact clause in the policy allows them to make the decision to exclude your beloved son!
I would then send my son in to school anyway and be there with him ready to challenge any member of faculty who is against you.
Ask to speak to the girl directly and make sure her parents know what their daughter is up to!
You need to ask for your school as well to release all files they have of your son to you.
Ask them if this girl has made similar accusations. Also ask for what has actually happened and demand a meeting with the principal of the school; make sure you and your son, and any other relevant party (such as your husband etc) are present. Directly ask the principal what has happened, what your son stands accused of, who is the girl making the accusation, what lead the school to make such a decision of exclusion, ask them to pinpoint the exact clause in the policy as to why the school is allowed to exclude your son. ask if it’s normal policy for children to be excluded. Ask when your son gets to make his defence; also ask if the accusation is false what compensation will your son get for being excluded?
Say if your son has not done what he is accused of doing (false accusation) you oppose their decision of exclusion regardless of whether is is legal for them to do or not; and you will be making a formal complaint against the principal and you demand that the principal and whoever else in charge of hurting and humiliating your son are not allowed to have any contact to do with him or yourselves until the formal complaint against them is resolved how you like it to be. Also ask since an accusation against the principal is being made does that mean they are excluded while it is being investigated?
Make sure to make a counter-claim against that girl who falsely accused your son of false accusations and bring in the evidence of false accusations which that girl made against your son.
Get people to back-up your son and even witnesses to give true testimony in support of your son to permanently discredit the vicious lies of that girl.
Don’t worry with God’s Help we can prove your son innocent and put that lying, selfish girl in her place!!!!