during the final exam, I carelessly put reviewing materials on the ground and the TA accused me of cheating in the exam but I didn't even looked at them at all. Thus there is no similarity between my exam paper and the reviewing materials, but our dean of student has submitted this to the discipline committee, and there will be a hearing in at the end of this month.
Divorce / Separation Lawyer
If you are allowed to have counsel at the hearing then it might be helpful. However, often lawyers are not permitted at such hearings. At the very least you could consult with an attorney who is experienced in these hearings to become more familiar with what to expect and how to respond to questions.