I read the article "Dealing With an Elderly Parent’s Difficult Behavior" and found it useful, but wondered about suggestions for when the delusions are directed at caregiver? Senior is functioning well at home on own with regular check-ins/visits, but this new piece is a struggle.
I installed Nest Cameras in the home so I could view what was going on anytime I want 24 7.
It puts your mind at ease.
Also, make sure lived one doesn't have a (UTI) urinary tract infection.
https://teepasnow.com/blog/how-to-respond-to-unfounded-accusations-when-dementia-is-involved/
https://dailycaring.com/responding-to-4-common-dementia-accusations-stealing-poisoning-being-held-prisoner/
The sad thing is that in the case of a new caregiver or a new care facility there MAY BE instances where the person who suffers from dementia is prey to those who may take advantage of them.
This all makes assessment of the situation extremely difficult. I had such a situation when my brother, suffering from probably early Lewy's by diagnosis entered into care and believed someone stole from him. This turned out NOT to be the case, but he was very convinced and because he was ordinarily very bright and "with it" there was a tendency to want to believe him, all the while ALSO believing that what he was describing was very unlikely.
I wish you luck in combing out the facts in your own case. If this "caregiver" is family, them you will already know the person, but if a stranger you will have more difficulty in discussing this with your elder.
More information from you regarding the exact situation (s?) may be useful for our own input.