What type of attorney does my family have to consult, aunt passed away without a will?

My aunt passed away a couple of months ago and to our knowledge did not leave a Will. She has property upstate which she was the sole person person listed on the deed. We just learned that the property is now in her Partner's name. We were able to obtain a copy of the Quitclaim Deed from the County Recorder's Office and the signature is questionable, especially when my aunt no longer had use of her motor skills at the time the document was signed and according to the clerk, the Grantor made a court appearance (posthumously!). Her Partner has since sent an order to evacuate from the property to the current inhabitant - who is the brother of the decedent. We have also learned that documents concerning my aunt's care was also falsified by her partner.