Know Your Rights if ICE Comes to South Dakota

This page is information, not legal advice. Governor Rhoden launched Operation Prairie Thunder in July 2025, deploying the South Dakota Highway Patrol, National Guard, and the Department of Corrections in a statewide immigration enforcement partnership with ICE. The Highway Patrol has a statewide Task Force Model 287(g) agreement. National Guard members process ICE paperwork in Sioux Falls and Rapid City. Enforcement has reached small towns across South Dakota - manufacturing plants, dairies, and saturation patrols in communities like Belle Fourche, Huron, Yankton, and Madison. The Sioux Falls Latino Festival was canceled due to safety concerns. Detainees are transported to the ICE regional office in Minneapolis. Verify current conditions with the ACLU of South Dakota, or a licensed immigration attorney.

South Dakota has become one of the most actively cooperating states in the country under Operation Prairie Thunder, announced by Governor Larry Rhoden on July 28, 2025. The program has two components: enhanced law enforcement saturation patrols in the Sioux Falls metro area, and a comprehensive state partnership with ICE to support immigration enforcement statewide. It was initially set to run through December 2025 and was extended into 2026.

Operation Prairie Thunder deployed state troopers, National Guard members, helicopters, and the Highway Patrol across South Dakota's communities. By the time the program's first five months ended, 89 individuals had been identified as ICE contacts, 75 people were taken into custody during operations in Belle Fourche, Huron, and Yankton alone, and enforcement had reached manufacturing plants, dairies, and small towns across the eastern half of the state. The Sioux Falls Latino Festival and Parade was canceled for 2025 due to safety concerns - the South Dakota Hispanic Chamber of Commerce reported that Hispanic residents no longer felt comfortable coming to Sioux Falls.

South Dakota falls within the Minneapolis ICE field office's jurisdiction. Detainees from South Dakota are transported to the regional ICE headquarters in Minneapolis. The state has no major ICE detention facility of its own.

Part 1: Your rights under federal law - everywhere, including South Dakota

These rights come from the U.S. Constitution. They apply in South Dakota regardless of immigration status, citizenship, or how you entered the country.

At your front door

The Fourth Amendment protects your home from government entry without your consent or a judicial warrant. A judicial warrant is signed by a federal judge, based on probable cause, and authorizes entry to a specific address. An administrative warrant - ICE Form I-200 or I-205 - is signed by an immigration officer, not a judge, and does not authorize entry to your home without your consent. Ask through the door which type of warrant is being presented. If it is administrative, you are not required to open the door.

During a traffic stop - including Highway Patrol stops

You have the right to remain silent. You do not have to answer questions about where you were born, your immigration history, or your status. You can say you are exercising your right to remain silent and want to speak to a lawyer. You can ask whether you are free to go. If the officer says yes, you may calmly leave.

The South Dakota Highway Patrol has a statewide Task Force Model 287(g) agreement with ICE. Under this agreement, SDHP troopers can conduct immigration enforcement during routine traffic stops. The Highway Patrol's saturation patrol program under Operation Prairie Thunder means that traffic stops - particularly in the Sioux Falls area but also in communities where saturation patrols have been conducted - can include immigration enforcement elements.

During the first Highway Patrol saturation patrol in Sioux Falls in August 2025, troopers logged 14 ICE encounters, 8 of which resulted in ICE arrests. The Highway Patrol's position is that ICE can check legal status remotely - without physically coming to the stop - while the person is still being held. Under the 287(g) Task Force agreement, troopers have authority to detain individuals suspected of lacking legal status.

At your workplace

ICE may enter public areas of a workplace without a warrant. Private areas generally require a judicial warrant or employer consent. You have the right to remain silent in any workplace encounter. Enforcement has reached manufacturing plants, food processing facilities, and agricultural businesses across South Dakota. Eight people were arrested at Manitou Equipment and Global Polymer Industries in Madison in May 2025. ICE confirmed an active investigation at Trail King Industries in Mitchell. Drumgoon Dairy near Lake Norden was subjected to a Homeland Security audit that resulted in 38 employees losing their positions.

Do not sign anything without a lawyer

Documents presented during an ICE arrest may include voluntary departure agreements or stipulated removal orders that waive your right to a hearing before an immigration judge. Do not sign anything without speaking to an attorney first. South Dakota has limited immigration legal services capacity. Connecting with legal help before a crisis is particularly important here.

Part 2: Operation Prairie Thunder and the statewide enforcement network

The Highway Patrol statewide Task Force agreement

The South Dakota Highway Patrol signed a 287(g) Task Force Model agreement with ICE, making every credentialed SDHP trooper a potential immigration enforcement officer during routine patrol activities statewide. Saturation patrols - deployed two or more times per month in Sioux Falls and periodically in other communities across the state - are a core element of Operation Prairie Thunder. These patrols also use state aircraft for surveillance and drug enforcement support.

The Department of Corrections jail enforcement agreement

The South Dakota Department of Corrections signed a Jail Enforcement Model 287(g) agreement in July 2025. Under this model, DOC can identify and process individuals in its custody who may be in violation of immigration laws. The state Board of Pardons and Paroles also transferred undocumented immigrants serving prison time to ICE custody as part of Operation Prairie Thunder.

National Guard processing ICE paperwork

Governor Rhoden assigned six National Guard members - three in Sioux Falls and three in Rapid City - to process ICE arrest paperwork, allowing ICE agents to remain in the field rather than handle administrative work. A National Guard liaison also serves as the communication point between ICE and the National Guard members doing this administrative work. This administrative support model frees ICE enforcement capacity without requiring Guard members to directly conduct arrests.

Detainers and county jails

The majority of ICE detainer requests from July through October 2025 went to the Minnehaha County Jail in Sioux Falls, followed by the Pennington County Jail in Rapid City and the South Dakota State Penitentiary in Sioux Falls. These facilities are the primary holding locations before detainees are transported to Minneapolis.

Brookings opted out

When Operation Prairie Thunder announced an upcoming saturation patrol in Brookings in December 2025, the city issued a public statement saying it would not be participating. The Highway Patrol then conducted the patrol without stopping in Brookings, going to Sturgis and Winner instead. Brookings' choice not to participate in the community phase of the saturation patrol represents one documented instance of a South Dakota community declining involvement. It does not change the Highway Patrol's statewide 287(g) enforcement authority.

Part 3: Small town enforcement - what it looks like

South Dakota's immigrant communities are concentrated not just in Sioux Falls but across the small towns of eastern South Dakota - in communities built around meatpacking, food processing, agriculture, and manufacturing. Enforcement has reached these communities specifically.

In Madison (Lake County), eight people were arrested at Manitou Equipment and Global Polymer Industries in May 2025. In Belle Fourche, Huron, and Yankton, Operation Prairie Thunder operations in December 2025 resulted in 75 people taken into custody, 27 identified as ICE contacts. In Mitchell, ICE confirmed an active investigation at Trail King Industries. Near Lake Norden, Drumgoon Dairy faced a Homeland Security employment audit resulting in 38 employee terminations.

Enforcement in small towns creates specific vulnerabilities: communities are small, employers know their workforce, and people cannot blend into a large city after an arrest becomes known. The chilling effect reported by the South Dakota Hispanic Chamber of Commerce - that Hispanic residents don't feel safe coming to Sioux Falls - extends to every small community where Operation Prairie Thunder has operated.

Part 4: What to do right now, before anything happens

Know your A-number and make sure trusted family members have it written down. Detainees from South Dakota are transported to the Minneapolis ICE field office. Family members need the A-number to locate you in the ICE detainee locator.

Know that the SDHP has a statewide Task Force Model 287(g) agreement. Any routine traffic stop by an SDHP trooper is a potential immigration enforcement encounter. This applies across South Dakota, not just in Sioux Falls saturation patrol zones.

Know whether your employer has been subject to enforcement interest. Manufacturing, food processing, dairy, and agricultural employers across eastern South Dakota have been the targets of ICE investigations, arrests, and audits. Knowing your employer's enforcement history and maintaining current documentation matters.

Identify an immigration attorney before you need one. South Dakota has limited immigration legal services. The ACLU of South Dakota and the South Dakota State Bar's lawyer referral service are starting points. Immigration Advocates Network at immigrationadvocates.org lists South Dakota providers.

Prepare guardianship documents for any children. Set up a financial power of attorney so a trusted person can manage accounts and property if you are detained and transported to Minneapolis.

Part 5: Legal help and resources in South Dakota

The ACLU of South Dakota monitors enforcement developments and immigrant rights issues in the state. Their website is aclusd.org.

The South Dakota Hispanic Chamber of Commerce, whose vice president Ivan Romero has been a public voice on the impact of enforcement on the South Dakota Hispanic community, can connect families with community resources.

South Dakota News Watch and South Dakota Searchlight have been the primary news organizations tracking Operation Prairie Thunder and enforcement developments in depth and are the best sources for current information.

For immigration court case information, call the EOIR automated line at 1-800-898-7180. To locate someone in ICE custody, use the ICE Online Detainee Locator at locator.ice.gov. South Dakota detainees are transported to the ICE Minneapolis field office region. If your person does not appear in the locator, call the ICE Detention Reporting and Information Line at 1-888-351-4024.

Immigration Advocates Network lists South Dakota legal providers at immigrationadvocates.org.

South Dakota launched Operation Prairie Thunder in July 2025, deploying state troopers, National Guard members, and the Department of Corrections in a sustained partnership with ICE that continued into 2026. The Highway Patrol's statewide Task Force agreement means any SDHP traffic stop is a potential immigration enforcement encounter. Enforcement has reached manufacturing plants, dairies, and small towns across eastern South Dakota. The Sioux Falls Latino Festival was canceled due to community fear. Detainees go to Minneapolis. Your federal constitutional rights apply in full: an administrative warrant does not authorize entry to your home, your right to remain silent applies during Highway Patrol stops, and you cannot be compelled to sign anything without a lawyer. Knowing those rights, knowing the Highway Patrol's statewide enforcement authority, and connecting with legal resources before a crisis are the foundations for protecting your family in South Dakota.

This page reflects conditions as of mid-2026. Operation Prairie Thunder was announced July 28, 2025, and extended into 2026. The Highway Patrol and DOC 287(g) agreements were signed in 2025. Saturation patrols in Belle Fourche, Huron, Yankton, and other communities occurred December 2025. Verify current Operation Prairie Thunder activities and 287(g) status with South Dakota Searchlight or the ACLU of South Dakota.