What are her rights? The violent resident has hit the back of a resident while waiting for the elevator, then lashed out verbally when caregiver told her to stop. She also has the dining attendant to pour coffee in a glass. Attendant told her the glass might break from the heat of the coffee. The resident then threatened her with a fork and caused a mild abrasion.
When my mom was in IL there was a resident with fairly severe dementia who had a one to one aide with her at all times. It was my understanding that this person had previously lashed out at staff and residents.
Management sought to evict her but agreed to let her stay if family paid for a private aide with her at all times.
How do you know the events occurred as reported to you? If a person with dementia reported it, I'd get independent confirmation, as their account could be flawed due to dementia or it could be a delusion.
But what on earth do the ILF's administrators have to say for themselves about this? Is the resident new and having trouble settling? Or is it new behaviour on the part of an established member of the community?
Your mother should make a formal complaint, as should any other residents who have witnessed these behaviours; and I agree that you should help her follow it through to a satisfactory outcome.
Independent Living facilities are governed by the same laws as other apartment buildings in most places. They are not regulated by the State.
Sit down with the director and indicate that your mother feels threatened by this individual's behavior. Find out if they have a plan in place to fix this situation and what the timeline is, "so that I can reassure my mother that this is not going to go on much longer". Follow up this conversation with a written communication, sent return receipt requested, documenting what your mother has witnessed and the fact that she feels afraid and intimidated.
If there is not a resolution or response, I'd follow up with another written communication, with a CC to your lawyer and the corporate office of the the management company.
If the management shows no inclination to fix the issue, I'd start looking for another place.
If your mother feels directly threatened, I'd tell her to call 911.