How do I regain custody of my child when the case in FL is closed and WA refuses to get involved?

If the parties have lived in Washington for a year, Washington has jurisdiction.  If your attorney cannot help you, you may want to consult another attorney.  Make sure you consult with someone who has experience with family law matters.  I do not have enough information to give you specific advice and, in fact, most attorneys would want to review all the documents and discuss the facts of the case with you before giving advice.  In general, Washington will assume jurisdiction of children who have lived continuously in the state for at least six months.  That means that the courts here are empowered to make the types of decisions you are seeking after the children have been living in Washington for that amount of time.  I understand that CPS  might be hesitant to get involved with a valid Florida court order.  That just means that you need to have the Washington courts get involved and try to get a decision in Washington.  You do that by filing a petition in the superior court for the county where your monther and the children are now residing.  The type of petition really depends on the Florida orders. By the way, there seems to be some confusion.  Simply because there are no Washington court orders giving your mother rights to your son doesn't mean that your mother doesn't have rights to your son.  Under the US Constitution and the uniform interstate act, states honor the decisions made in sister-state courts.  In other words, the florida orders are enforceable here just as if they were issued in Washington. I hope this helps.