Oklahoma's land reserved for the Creek Nation since the 19th century remains "Indian country". Native Americans residing in the reservation cannot be criminally prosecuted by the state of Oklahoma. Decided July 9, 2020 (argued May 11, 2020). Opinion of the Court: Neil Gorsuch → go there Dissenting: Roberts, Thomas. Topic: Native American law. McGirt v. Oklahoma, 591 U.S. 894 (2020), was a landmark United States Supreme Court case which held that the domain reserved for the Muscogee Nation by Congress in the 19th century has never been disestablished and constitutes Indian country for the purposes of the Major Crimes Act, meaning that the state of Oklahoma has no right to prosecute American Indians for crimes allegedly committed therein. The Oklahoma Court of Criminal Appeals applied the McGirt rationale to rule nine other Indigenous nations had not been disestablished. As a result, almost the entirety of the eastern half of what is now the state of Oklahoma remains Indian country, meaning that criminal prosecutions of Native Americans for offenses therein falls outside the jurisdiction of Oklahoma’s court system. In these cases, jurisdiction properly vests within the Indigenous judicial systems and the federal district courts under the Major Crimes Act. Wiki link