Here is the opinion in Medina v. Estate of Cody:

An excerpt:

The issue before us is whether a plaintiff who is not an enrolled tribal member may bring a civil tort case in state court against an enrolled tribal member for conduct occurring within tribal reservation boundaries but on a stretch of land for which the State has been granted a highway right-of-way easement. We hold that a non-tribal plaintiff bringing such a case cannot hale a nonconsenting enrolled tribal member defendant into state court for actions arising out of conduct on the defendant’s reservation, even when that conduct occurs on a state highway. Accordingly, we affirm.