Also, if a student gets in trouble at school, the principal can call the police and press charges. The principal can take legal action against the student and complain to the police about the student. Principals are using their right to expel and suspend students. Some of the students have returned to school, and some have not. Each principal decides how individual situations are handled.
Principals do have to present evidence and witnesses during the hearing.
But remember, students have the right to challenge the evidence and question the witnesses. Hearings can be recorded. Each student discipline code and rules vary from school to school.