Here is the complaint in Muscogee Creek Indian Freedmen Band, Inc. v. Zinke (D.D.C.).
From the press release:
The Muscogee Creek Nation (“MNC”), with full knowledge and approval of the DOI, continues to deny so-called “Creek Freedmen” and their Descendants their Creek citizenship in violation of the Creek Treaty of 1866, the Constitution of the United States, the Administrative Procedure Act, and the Indian Civil Rights Act. The so-called Creek Freedmen continue to be denied basic rights of citizenship including but not limited to their right to vote, right to hold office, and right to be recognized for who they are: Creek Indians by birthright, heritage, history, and culture. The named Defendants are the Creek Nation Principal Chief,James Floyd; the United States Department of the Interior (“DOI”); and the Hon. Ryan Zinke, Secretary of DOI.
Turtle Talk 