What kind of lawyer do I need to litigate a breach of a share-and-share-alike heir to my late mother's estate who died with a will in 2004?

My sister, has not distributed any of her assets to date and is claiming I entered a verbal agreement to relinquish all rights as to any and all of her assets in 2004, which is totally untrue without any evidence to that affect whatsoever and that I also verbally relinquished all rights to any and all monies to future proceeds from a class-action Asbestos lawsuit represented by The Peter Angelos Law Firm, Baltimore, MD. She is a NJ resident and I a VA resident, therefore, the question of jurisdiction and venue remains also. For the record, I am a victim of the 911 Terrorist Attack on the Pentagon who was diagnosed with PTSD in 2001 and have been since 9/13/2001 and remain currently under medical care by an MD for same and remain on medication and psychotherapy. I believe this fact is the motivation my sister is using to withhold all funds to which I am legally qualified and deserve!