End Domestic Terrorism Act

Bill Number

H.R. 4257

Origin Chamber

House

Congress

119th Congress, Session 1

Policy Area

Crime and Law Enforcement

Status

Introduced

Latest Action

2025-06-30: Referred to the House Committee on the Judiciary.

Last Updated

2025-07-29T14:57:44Z

AI-Generated Summary

Purpose of the Legislation

The "End Domestic Terrorism Act" (H.R. 4257) aims to strengthen federal penalties for mass killings committed with certain firearms or devices, classify such acts as domestic terrorism, and improve transparency through reporting requirements. It targets incidents involving machineguns, destructive devices (explosives or similar weapons), or specific semiautomatic weapons in public or sensitive locations, framing them as threats to interstate commerce and national security.

Key Provisions

• New Criminal Offense (Section 2332j): Creates a federal crime for anyone who kills three or more people in a single incident using a machinegun, destructive device, or "covered semiautomatic weapon." Penalties include imprisonment for any term of years or life.
• Triggering Circumstances: The act must involve interstate or foreign commerce (e.g., using mail, transporting the weapon across state lines, or traveling in furtherance of the crime) or occur in U.S. maritime/territorial jurisdiction, or otherwise affect commerce.
• Covered Locations: Includes schools, places of worship, medical or childcare facilities, government buildings (including courthouses and voting sites), entertainment/educational venues (e.g., concerts, sports events, museums, theaters), public events (e.g., parades, races), retail spots (e.g., malls, stores, restaurants), and office buildings.
• Definition of "Covered Semiautomatic Weapon": Broadly defined to include:
• Semiautomatic rifles with detachable magazines and features like pistol grips, forward grips, adjustable stocks, grenade launchers, barrel shrouds, or threaded barrels.
• Semiautomatic rifles with fixed magazines holding over 10 rounds (except certain .22 caliber rimfire types).
• Devices or attachments that speed up firing rates without converting to fully automatic.
• Semiautomatic shotguns with detachable magazines, certain grips/stocks, capacity over 5 rounds, or other features like grenade launchers.
• AK or AR-style weapons (or copies/variants).
• Any similar weapons added by the Attorney General through public rulemaking (formal process with hearings).
• References existing definitions for "machinegun" (from tax law) and "destructive device" (from gun control law).
• Material Support Expansion: Adds this new offense to existing laws prohibiting providing support (e.g., resources or aid) to terrorists.
• Reporting Requirements:
• Annual Congressional Report (Section 3): Starting one year after enactment, the Attorney General must report to Congress on cases charged under the new offense or material support laws, including offense details, victim/injury numbers, perpetrator demographics (age, gender, race, ethnicity, nationality), weapons used, and support types.
• Intercepted Communications Reporting (Section 4): Updates surveillance reports to include demographics of arrested individuals.
• Public Incident Reports (Section 5): Within 180 days of filing charges under the new offense, the Department of Justice (DOJ) must publish online details like people present at the scene, government response costs (e.g., law enforcement, medical/mental health aid, business support), lost business revenue, and victim compensation provided (e.g., via the Crime Victims Fund).

Significant Changes to Existing Law

• Introduces a new standalone federal offense in Chapter 113B of Title 18 (U.S. Code on terrorism), linking mass killings with specific weapons to domestic terrorism statutes, which previously focused more on international threats or general violence.
• Expands definitions in Section 2331 to include detailed criteria for "covered semiautomatic weapons," allowing Attorney General rulemaking for additions—unlike prior laws that did not specify these weapon types in terrorism contexts.
• Enhances penalties beyond general murder statutes by mandating severe sentences (up to life) specifically for these weapon-involved mass killings, and integrates it into material support prohibitions.
• Adds mandatory demographic and cost-tracking reporting, which was not required in prior terrorism or gun violence laws, promoting data collection on domestic incidents.

Potential Impacts

• On Government Agencies: Increases DOJ workload for prosecutions, investigations, and annual/public reports; may require more resources for rulemaking on weapon definitions and surveillance reporting. Law enforcement at federal, state, and local levels could see heightened coordination for interstate cases and response cost tracking.
• On Citizens: Deters potential mass killers by imposing life sentences, potentially reducing incidents in listed locations; victims and communities gain from detailed public reports on impacts and aid. Gun owners with "covered" weapons may face stricter scrutiny, though the law targets criminal use, not possession.
• On International Relations: Minimal direct impact, but classifying domestic mass killings as "terrorism" could align U.S. policy with global anti-terrorism efforts, possibly aiding information-sharing on weapon trafficking.

Main Stakeholders Affected

• Perpetrators and Potential Offenders: Individuals using prohibited weapons in mass killings face enhanced federal charges and penalties.
• Victims, Families, and Communities: Benefit from improved transparency on incident costs, aid, and demographics, potentially leading to better support services.
• Law Enforcement and DOJ: Responsible for enforcement, prosecutions, and reporting; may need training on new definitions.
• Gun Owners and Manufacturers: Affected by broad weapon definitions, which could influence legal possession or sales if expanded via rulemaking.
• Congress and Policymakers: Receive data to inform future gun violence or terrorism policies.
• Businesses and Retail Venues: Impacted by potential incidents, with reports tracking economic losses and government reimbursements.

Notable Legal, Constitutional, or Political Implications

• Legal: The law's reliance on interstate commerce to establish federal jurisdiction (a common clause in gun laws) reinforces Supreme Court precedents but could face challenges if seen as overbroad. Rulemaking by the Attorney General introduces administrative flexibility, subject to judicial review under the Administrative Procedure Act (a federal law governing agency decisions).
• Constitutional: May raise Second Amendment concerns over weapon definitions, as they target features on common semiautomatic firearms; critics could argue it indirectly burdens lawful ownership without due process. Demographic reporting in surveillance could implicate Fourth Amendment privacy rights if not carefully managed.
• Political: Positions mass shootings as "domestic terrorism," potentially polarizing debates on gun control versus rights; supports calls for accountability in responses to public violence but could be critiqued for focusing on penalties over prevention (e.g., mental health or background checks). The emphasis on reporting promotes evidence-based policy without mandating new restrictions on legal gun ownership.

This summary was generated by AI and may contain inaccuracies. Refer to the official source document for the authoritative text.

Sponsor

Rep. Moulton, Seth [D-MA-6]

Cosponsors (1)

Rep. Escobar, Veronica [D-TX-16]

Recent Actions

• 2025-06-30: Referred to the House Committee on the Judiciary.
• 2025-06-30: Introduced in House
• 2025-06-30: Introduced in House

Bill Versions

• End Domestic Terrorism Act — issued 2025-06-30 — PDF (9 pages)