If her lease isn't up til May??
I wonder if there is a legal way to get out of it due to the stress and maybe even hostile living environment.

I think there is a law about hostile workplaces. Seems like it should apply to your home also.

Possibly a strong letter from your Dr?
Might be something to ask about after you update at your next appt.
And copies of the police reports/records.

I don't recall if you read over your lease to see if there are ways to get out of it.
Is there a agency or the actual owner over the local manager of your complex?
You might contact them if you need to go to the next level.