in virginia

My dad passed away several years ago. At his passing my mother locked herself in their house and sent my sister and I away without word or warning. She did not speak to either of us until at the funeral. She began "claiming" all items that were "hers" (ie old car of dad's) by calling police on my sister down from another state.

My father was very generous and supported myself and my sister both single parents in school trying to pull together our lives. It still seems fundementally odd that he made no legal provisions for me, my sister or his grandkids that he loved very much.

Neither my sister or I ever saw a will or any legal documents regarding my father's wishes. Is there some way to determine, IF anything was ever written or filed? I realize that in Virginia "everything" goes to my mother, but is that in absence of a will?

Thanks for any information.