My question involves tenant law in the State of: Illinois
I am in a joint lease with one other person for a two bedroom apartment in Illinois. My roommate has a crazy girlfriend and I have told him that under no circumstances is she to enter our apartment. If she does I have explicitly stated that I will consider her a trespasser and call the police.
My question is, can I actually call the police and will they do anything? Is she legally a trespasser or a guest? Specifically I do not feel safe around the girlfriend, so does my roommate's right to have guests supersede my right to feel safe in my apartment.

