A 5-4 split, but not on the usual lines.
http://www.supremecourt.gov/opinions/12pdf/12-399_8mj8.pdfSCOTUS punted on the issue of who is a Native American by ruling that even if the biological father was one, the Indian Child Welfare Act of 1978 does not apply. So a win for the adoptive couple, a loss for the biological father, and a wash for the Indians, as while this narrows the scope of this act, some were worried the court might wade in with an opinion as to who is an Indian and thus limit the rights of the tribes to define themselves.