Yeah, when I was at uni (in a small town where the majority of people are students), the university never informed us about things like this. Even on occasions when several female students had been sexually harassed/attacked. I know it sounds odd because you'd hope that student safety would be the absolute priority, but some universities are extremely reluctant to admit that any crimes have happened on or near campus, whether students have been involved or targeted.
Others have commented that people around Libby's age don't tend to follow police on SM - this is definitely true of all of my FB friends! Everyone I know is either from my university or local area, and none of them follow the police in either area. Although it might not surprise you that I do haha