Legal Frameworks Addressing Missing and Murdered Indigenous Persons
The crisis of missing and murdered Indigenous persons (MMIP) in the United States operates at the intersection of tribal sovereignty, federal criminal jurisdiction, and chronic law enforcement gaps that have persisted for decades. Federal statutes, executive orders, and interagency task forces have each addressed discrete aspects of this problem, but the governing legal framework remains distributed across multiple sovereigns and statutory authorities. This page maps the statutes, agencies, jurisdictional rules, and procedural structures that define how MMIP cases are identified, investigated, and prosecuted under U.S. law.
Definition and scope
The MMIP crisis refers to the disproportionate rates at which American Indian and Alaska Native women, men, and children go missing or are killed compared to non-Native populations. The Department of Justice (DOJ) has documented that American Indian and Alaska Native women face murder rates more than 10 times the national average in certain regions, according to data published through the DOJ's research initiatives and the National Institute of Justice.
The legal scope of MMIP encompasses three distinct governance layers: tribal law, federal criminal statutes, and — in specific states — state jurisdiction. The foundational challenge is that Indian Country criminal jurisdiction (as defined under 18 U.S.C. § 1151) divides authority based on the identity of the perpetrator, the identity of the victim, and the location of the offense. Understanding this division requires familiarity with the how the U.S. legal system works conceptually, particularly how federal plenary power interacts with retained tribal authority.
Savanna's Act (P.L. 116-166), enacted in 2020, and the Not Invisible Act (P.L. 116-165), also enacted in 2020, are the two primary federal statutes directly addressing the MMIP crisis. Both laws assign responsibilities to the DOJ and the Department of the Interior (DOI).
How it works
The legal framework governing MMIP cases operates through a structured set of phases that span initial reporting, jurisdictional determination, investigation, and prosecution.
- Jurisdictional classification: The first determination in any MMIP case is which sovereign has authority. Under 18 U.S.C. § 1152 (the General Crimes Act) and 18 U.S.C. § 1153 (the Major Crimes Act), federal courts hold jurisdiction over major crimes — including murder — committed in Indian Country when the perpetrator is non-Indian or when the crime falls within the Major Crimes Act's enumerated offenses. For an overview of these statutes, see Major Crimes Act: Tribal Implications.
- Reporting and data entry: Savanna's Act requires the DOJ to update guidelines for federal, state, and tribal law enforcement on entering data into federal databases — specifically the National Crime Information Center (NCIC) — when a Native person is reported missing. Prior to this statute, NCIC entries for Native victims were inconsistently filed.
- Tribal notification and coordination: Savanna's Act mandates that DOJ consult with tribal governments to develop and implement these guidelines. Tribes retain the authority under tribal law to conduct parallel investigations through their own law enforcement structures, subject to limits on jurisdiction over non-Indians established by the Supreme Court in Oliphant v. Suquamish Indian Tribe (1978). See Oliphant v. Suquamish and Criminal Jurisdiction for the doctrinal background.
- Interagency task force operations: The Not Invisible Act established a joint DOI–DOJ advisory committee on violent crime in Indian Country, composed of tribal leaders, law enforcement, federal officials, and survivors. This committee submits recommendations on reducing violent crime, with specific attention to MMIP cases.
- Prosecution referral: When federal jurisdiction applies, the FBI or Bureau of Indian Affairs (BIA) Office of Justice Services investigates; the U.S. Attorney's office for the relevant district decides on prosecution. Tribal prosecutors handle cases that fall within tribal criminal jurisdiction — including, since the Violence Against Women Reauthorization Act of 2022, expanded special domestic violence criminal jurisdiction over non-Indians for certain offenses. See Violence Against Women Act: Tribal Provisions.
Common scenarios
Scenario 1 — Non-Indian perpetrator, Native victim, Indian Country offense: Federal jurisdiction applies under 18 U.S.C. § 1152 (General Crimes Act). The FBI and U.S. Attorney hold investigative and prosecutorial authority. Tribal law enforcement may respond first but lacks prosecution authority over the non-Indian offender absent specific statutory grants.
Scenario 2 — Native perpetrator, Native victim, Indian Country offense: Dual jurisdiction exists. The tribe may prosecute under tribal criminal codes. Federal prosecution may also proceed under the Major Crimes Act if the offense is enumerated (e.g., murder, manslaughter, kidnapping). The tribe and federal government can both prosecute without triggering double jeopardy because they are separate sovereigns.
Scenario 3 — Offense occurring in Public Law 280 states: In the 6 mandatory Public Law 280 states — Alaska, California, Minnesota (except Red Lake), Nebraska, Oregon, and Wisconsin — state governments hold criminal jurisdiction over offenses in Indian Country, including MMIP cases. Federal jurisdiction is not automatically displaced. See Public Law 280 Jurisdiction for the framework.
Scenario 4 — Missing person, no confirmed crime location: When the location of a disappearance is unknown, the jurisdictional framework is suspended until location is established. Savanna's Act specifically targets this gap by requiring NCIC data entry regardless of whether jurisdiction has been confirmed.
The contrast between Scenario 1 and Scenario 2 illustrates the most consequential classification boundary in MMIP law: perpetrator identity determines which sovereign prosecutes, while victim identity determines which databases and protocols apply under Savanna's Act.
Decision boundaries
Tribal vs. federal prosecution authority: Tribal criminal jurisdiction over non-Indians remains limited by Oliphant to the specific grants created by the Violence Against Women Act and its reauthorizations. Outside those grants, non-Indian perpetrators in MMIP cases are subject only to federal or state prosecution — not tribal prosecution — regardless of whether the offense occurred on tribal land. The broader tribal criminal jurisdiction over nonmembers framework governs this boundary.
Federal mandatory declination: U.S. Attorneys retain prosecutorial discretion. In cases where federal jurisdiction exists but the U.S. Attorney declines, no automatic fallback prosecution mechanism exists under current law. This gap has been identified in DOJ internal reviews as a structural problem in MMIP case resolution.
Savanna's Act vs. Not Invisible Act scope: These two statutes address different dimensions of the same crisis. Savanna's Act focuses on data, reporting protocols, and law enforcement guidelines. The Not Invisible Act focuses on policy recommendations through an advisory committee. Neither statute creates a private right of action or mandates specific outcomes in individual cases.
State jurisdiction boundary: State authority in Indian Country is generally prohibited absent Congressional authorization, per the baseline framework of Public Law 280 and tribal-vs-federal-vs-state jurisdiction. MMIP cases in non-PL 280 states are not subject to state prosecution, even when tribal or federal agencies lack the capacity to investigate. This creates documented investigative voids on reservations where tribal law enforcement is underfunded and federal agency response is delayed.
VAWA 2022 expansion: The Violence Against Women Reauthorization Act of 2022 extended tribal special domestic violence criminal jurisdiction to cover additional offenses including sex trafficking, stalking, and assaults against children — categories directly relevant to MMIP patterns. Tribes electing to exercise this jurisdiction must provide the due process protections codified in the Indian Civil Rights Act (25 U.S.C. §§ 1301–1304). The Indian Civil Rights Act overview provides the governing civil liberties framework.
The triballawauthority.com resource index provides additional cross-references to the jurisdictional doctrines and federal statutes that form the legal infrastructure governing MMIP cases across the 574 federally recognized tribes in the United States (Bureau of Indian Affairs).