Here are the materials in United States v. Fisher (D. Minn.):
Here is the complaint in Fond du Lac Band of Lake Superior Chippewa v. Stepp (D. Minn.):
There have been a long series of federal cases in Minnesota involving tribal court child welfare jurisdiction over non-member children residing on the reservation (Watso, Nguyen). Most recently, Watso v. Piper was dismissed. The magistrate’s decision (that was upheld), is particularly well written.
Watso v. Jacobson here
Americans for Tribal Court Equality here