I took my appointment letter from school from almirah breaking the loc

I am primary teacher of West Bengal.CBI investigation is going on who get recruitment from 2014 TET.CBI asked primary board(West Bengal board of primary education) to submit original documents of each included teacher.They asked to submit almost 17 types of documents.especially COPY OF APPOINTMENT LETTER which is kept in school.i request HEAD TEACHER to give me it .but he didn't give it to me.All other'teachers have submitted it.but i can't.getting fears i came school and broke the almirah lock and took the documents i.e COPY of appointment letter.and i submitted it to my office.Now headteacher fill FIR against me.almost 87 days past.police give me a notice and ask me about the fact . I have told all this fact honestly.My question aren1,can we mutually withdraw firn2.if not withdraw, what will be the next procedure?n3 what should I do nown4, police does not fill chargesheet till nownnN.b:I have highcourt order copy which ask us to submit documents