Thank you for using Just Answer.
There is no law in Illinois that specifically
makes it unlaw to pull another person's pants down in a public place. If a person were to pull down their own pants and intentionally expose themselves, that could lead to a possible charge of something like public indecency, but it is not unlawful for someone else to do so.
Theoretically, it may be considered a "battery" under Illinois law, though I cannot say whether a prosecutor would actually file charges over something like this. My professional opinion is they would not.
Battery is found in the criminal code at 720 ILCS 5/12-3, which provides the following:
A person commits battery if he (or she) intentionally or knowingly without legal justification and by any means causes bodily harm to an individual or makes physical contact of an insulting or provoking nature with an individual.
As the law expressly states, battery occurs where there is bodily harm or insulting or provoking contact by any means. Thus, even if the accused never personally touched the other person, if contact was made in some manner, then it can be a battery. However, the law is much more commonly used where there is actual contact -such as in a fight, when people strike one another.
It's a misdemeanor
, punishable by up to a year in jail and/or up to a $2,500 fine.
This sounds like something that happened at school, as you mention the principal -and I think you honestly would get more results taking it to the principal, or if they continue to refuse to cooperate, to the school superintendent.