I reported my ex to the school cops after he cheated on me
Why did you tell the school police officers?
I think he should be punished
You shouldn't report him to school police over something like that. It sounds like an issue that you should report to a counselor.
It doesn't matter what you think.
It's appropriate to talk about relationship problems with a school counselor. Reporting it to the police will only waste their time and they aren't going to punish him for something that isn't illegal.