What bothers me is this "16-year-old girl, who was not a KU student, was visiting residents in the building."
A 16 year old comes to visit and you don't watch out for her?
I think "visit" in this context means people taking advantage of a vulnerable minor. There is no good reason for a minor women to be in a dorm at all unless her older sister lives there and she really is "visiting" which I seriously doubt was what happened since they are threading this together with other stories citing she might be a runaway.