The teacher told her to put her phone away. She refused. The teacher then tell her to leave, she refused. The teacher then call in the principal (or maybe it was vice principal). She was asked to leave by the principal. She refused. So they had to call in the campus police. As a parent, I would be pissed that my kid miss an hour of class time because of some kid who’s inconsiderate and don’t know how to follow the rule. If you don’t want to be in class, just leave. Let those who want to be there have an opportunity to learn.