I have put cameras up there and tried to convince her nobody was their now they are hurting her when she is trying to sleep. She says they are shooting something at her head and it gives her head aches this all started when she lived in Florida and neighbor hood kids would scare the elderly she moved back home and she still hears them and sees them she is very sane and takes good care of herself what should I do?
Who lives with her? Is this a new symptom? Have you talked to her doc about it? It could be a uti, or a deepening of her dementia.
https://www.agingcare.com/Alzheimers-Dementia
It also sounds like you are going to need someone other than your son to look after her. I believe she is going to need more supervision that someone in college can give.
She would repeat these concerns at every visit and every phone call..and it went on for awhile, but eventually she moved on to other topics and let go of it.
Try to distract her or provide good lighting at night for her. Perhaps install a lock on the attack and give her a key and reassure her no one can hide up there anymore. Or you might try a white lie and say another elder in the town reported same thing last week and the police caught the kids and locked them up...so now you're safe mom.