I once found someone masturbate in the library. How does library deal with such situation

I once found someone masturbate in the library. How does library deal with such situation
I once found someone masturbate in the library. How does library deal with such situation
I didn't jack off I came during my sleep!
I didn’t jack off I came during my sleep! <–

The appropriate thing to do would be to contact campus police and leave the area. You can also inform a library staff member, and they will call campus police. As to the post-it response, that’s quite common, and nothing to be embarrassed about.