NEW : S.C. couple says it is happy that the high court will hear their appeal . Comment: S.C. couple 's appeal will be heard by high court . A federal law meant to protect Indian family breakup is key to the case .
NEW : S.C. couple says it is happy that the high court will hear their appeal . Cherokee Indian man won custody of his biological daughter . S.C. couple 's appeal will be heard by high court . A federal law meant to protect Indian family breakup is key to the case .