FAFSA Dependency Override?

I know this has been asked time and time again, yet I'm hopeful someone who has been in my position or a professional will chime in.

I know that the FAFSA application has a set of circumstances for independent status, no need to reiterate those. My question pertains to the unusual circumstances for a dependency override, here are my brief details, I of course will provide documentation where I can and write more eloquently when I do submit my papers.

I have no contact with my biological father.

Mother died when I was 8.

Shortly before death, she and my adoptive father got divorced.

Father remarried- this is the only important part really.

Once my father remarried I left the house due to his wife, not because I simply did not like her, no.

I left due to emotional abuse on my part and her physical abuse to my father.

A great example of her insanity: As soon as they married all photos of me were gone, my parents wedding album and video were burned. Which, doesn't sound like much but when one parent is deceased it really does hurt.

They would fight about everything, often she would bring up my mother, spewing vicious things about her and claiming that I am not really his daughter and I don't deserve to have their name.

On top of that she has threatened suicide, beat my father with a wooden hiking stick and threatened that if he ever calls the police that she will take him with her.

That's the highlight reel, after this I moved into my grandmother's house, she is retired and I work to support myself and pay her rent.

I literally cannot get information from them if I tried, it's a dangerous household and the one time my grandmother tried to get paperwork my father's wife tried to hit her and we haven't tried since. I myself have not spoken to them in years and I can't, his wife won't let him have a cell phone and threatens us when we try to get any information, claiming, "He doesn't have to provide that, you don't deserve it."

If you haven't gotten it yet, she's a piece of work.

I know I'm leaving some stuff out, her history of slander toward my family and myself is too much to get into. Anyways, so far I have my own letter, my sister has written me one, I have one from my aunt (father's sister) who has knowledge of the situation, my grandmother who knows first hand what is going on and my therapist.

I do not have police documents, as I stated before, I don't contact them and the one time we mentioned the police the officer said there would be no case because it is the woman being abusive and the judge wouldn't do anything. I'm afraid of police involvement, she has stated that she has planted drugs in the house and if he calls the police that they will get him charged with it since he alone owns the house.

So, anybody who has been here, what should/can I do? More letters? Gather any evidence?

Please help.