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SIZEMORE v. STATE
2021 OK CR 6
Okla. Crim. App.
2021
Read the full case

Background

  • In July 2016 Sizemore was arrested after family reported concern; his 21‑month‑old daughter drowned and he was charged with first‑degree murder and assault/battery on a police officer in Pittsburg County, Oklahoma.
  • A jury convicted him; he received life without parole on the murder count and five years concurrent on the assault count.
  • On appeal Sizemore argued Oklahoma lacked jurisdiction because he was an "Indian" and the crimes occurred in Indian country; the court remanded for factual findings after McGirt v. Oklahoma.
  • The parties stipulated (and the district court found) that Sizemore had Indian blood, was an enrolled member of the Choctaw Nation on the offense date, and the Choctaw Nation is federally recognized.
  • The district court (adopting treaty history beginning with the 1830 Treaty of Dancing Rabbit Creek and subsequent treaties) found a Choctaw reservation was established in the 1800s and Congress never expressly disestablished it; the Court of Criminal Appeals adopted those findings.
  • Because the murder is an offense covered by the Major Crimes Act and the crimes occurred in Indian country, the Court vacated the convictions and remanded with instructions to dismiss for lack of state jurisdiction.

Issues

Issue Plaintiff's Argument Defendant's Argument Held
Whether Sizemore is an "Indian" for federal jurisdictional purposes Sizemore: he is an enrolled member of the Choctaw Nation State: did not contest; parties stipulated Court accepted stipulation; Sizemore is an Indian under federal law
Whether the crimes occurred in Indian country (Choctaw reservation) Sizemore: 19th‑century treaties created a Choctaw reservation and Congress never disestablished it State: presented no evidence of disestablishment on remand Court held treaties established a reservation and Congress never clearly disestablished it; the location is Indian country
Whether Oklahoma had jurisdiction to prosecute these offenses Sizemore: Major Crimes Act preempts state jurisdiction for murder (and possibly the assault) committed by an Indian in Indian country State: asserted jurisdiction at trial but provided no rebuttal evidence on reservation status on remand Held: State lacked jurisdiction; convictions vacated and case remanded with instructions to dismiss (federal jurisdiction)
Other trial‑level claims (ineffective assistance, sufficiency, admissibility, arrest, cumulative error) Sizemore raised multiple trial errors State defended convictions on the merits Moot — appellate court declined to address them because jurisdictional ruling required dismissal

Key Cases Cited

  • McGirt v. Oklahoma, 140 S. Ct. 2452 (2020) (held reservation status under 19th‑century treaties controls; framework for determining whether Congress disestablished reservations)
  • Solem v. Bartlett, 465 U.S. 463 (1984) (disestablishment of a reservation requires clear congressional intent)
  • Hagen v. Utah, 510 U.S. 399 (1994) (examples of statutory language showing cession or restoration relevant to disestablishment analysis)
  • Nebraska v. Parker, 136 S. Ct. 1072 (2016) (reinforces requirement that Acts of Congress must clearly show intent to disestablish a reservation)
  • State v. Klindt, 782 P.2d 401 (Okla. Crim. App. 1989) (Oklahoma lacks jurisdiction over crimes committed by or against Indians in Indian country)
Read the full case

Case Details

Case Name: SIZEMORE v. STATE
Court Name: Court of Criminal Appeals of Oklahoma
Date Published: Apr 1, 2021
Citation: 2021 OK CR 6
Court Abbreviation: Okla. Crim. App.