Here are the materials in George v. Superior Court (E.D. Wash.):

35 Fox Motion to Dismiss

39 DCt Order Dismissing Claims

An excerpt:

Here, the three elements for abstention are met. The underlying Superior Court proceedings are ongoing and it is generally recognized that family relations are a traditional area of state concern. Moore v. Sims, 442 U.S. 415, 435, 99 S.Ct. 2371, 60 L.Ed.2d 994 (1979); H.C. ex rel. Gordon, 203 F.3d at 613. The Superior Court had apparent concurrent personal jurisdiction over the parties with the Tribal Court and has jurisdiction to determine the legal affect of the Tribal Court proceedings, its own jurisdiction, and to consider deferring to the Tribal Court if it finds it appropriate. See Wash. Rev.Code 37.12.010; Maxa v. Yakima Petroleum, Inc., 83 Wash.App. 763, 767, 924 P.2d 372 (1996); Confederated Tribes of the Colville Reservation v. Superior Court of Okanogan County, 945 F.2d 1138, 1140, n. 4 (9th Cir.1991) (noting that Pub.L. 280 did not divest Tribal Courts of concurrent jurisdiction over child custody matters). The children were residing off-reservation in Spokane County for at least six months consecutive prior to when the custody petitions were filed, and it appears the children may have been domiciled on Yakama Nation land for at least a day when Plaintiff’s custody petition was filed in Tribal Court. Finally, both parties availed themselves of the child custody proceedings held in the respective courts. Defendant participated in the Tribal Court proceedings, and Plaintiff participated in the Superior Court proceedings. Thus, Plaintiff has an adequate forum in which to assert her federal claims. At this point, extraordinary circumstances do not exist that would require the Court to refrain from abstaining in this matter.