I would contact Christy Thompson Ibrahim, of Jones and Ibrahim.
http://seattledisabilitylaw.com/index.html Being the parent of 2 children with special needs, I have had the pleasure of attending classes and lectures presented by Christy on multiple occasions over the past 15 years, as well as using her services and that of her predecessor, Larry Jones (retired). You will not find anybody more knowledgeable on disability law in the state of Washington than Ms. Ibrahim. Her mother, Margaret-Lee Thompson founded King County Parent Coalition and has been a strong advocate in the special needs community for decades. In addition, Christy and her staff are very informative and easy to talk with.