ACLU Report Shows Growth In Immigration Detentions
More than 1,000 detained this year, sheriffs in 12 counties now helping effort.
The Waukesha County Sheriff Department, one of the agencies that participate in the 287(g) program. (Photo by Isiah Holmes/Wisconsin Examiner)
The number of Wisconsin county sheriff’s offices participating in a collaborative program with Immigration and Customs Enforcement (ICE) has jumped from nine to 12 this year, with other forms of cooperation with ICE growing across the state, according to a report by the American Civil Liberties Union (ACLU) of Wisconsin.
The report shows more sheriff offices joining the 287(g) program over the last three years. The program carves out dedicated immigration operations within the sheriff’s offices, shares data with ICE and increases local participation in ICE detention requests.
The ACLU report, released Tuesday, is an update from its 2022 report on Wisconsin’s “Jail-to-deportation pipeline.”
“Immigrants have been an important part of the fabric of Wisconsin for many years,” said Tim Muth, senior staff attorney at the ACLU of Wisconsin, in a statement released by the ACLU, along with the updated report. “They are a part of our families. They are our coworkers, friends, and neighbors, and the public should know what their local law enforcement agencies are doing.”
In 2022, there were eight law enforcement across the state participating in the 287(g). The program allows ICE Enforcement and Removal Operations (ERO) to partner with state and local law enforcement agencies, who are empowered to dedicate their own resources to pursuing people living without legal immigration paperwork in the United States.
“ICE recognizes the importance of its relationships with law enforcement partners to carry out its critical mission,” states a Department of Homeland Security (DHS) webpage.
Agencies can participate in 287(g) under a few different models including a “jail enforcement” model that focuses on people without legal immigration status already in local jails on other criminal charges, a “task force” model that gives local law enforcement officers limited authority to enforce immigration law and a warrant service program which allows local law enforcement to serve administrative warrants to people without legal status within county jails.
The participants in 287(g) include the sheriff’s offices of Brown, Fond du Lac, Kewaunee, Manitowoc, Marquette, Outagamie, Sheboygan, Washington, Waukesha (which is listed twice on the DHS website’s “pending agencies” portion), Waupaca, Wood, and Winnebago counties.
Six of those sheriffs (Kewaunee, Outagamie, Washington, Waupaca, Winnebago, and Wood counties) joined the program between from March to June of this year. The rest began participating in 287(g) in 2020, according to the ACLU report,
While some law enforcement agencies have joined the program, others have distanced themselves from immigration enforcement. The Milwaukee County Sheriff’s Office does not participate in the 287(g) program, and both that office and the Dane County Sheriff limit or prohibit their participation in immigration activities. The Milwaukee Police Department (MPD) also has policies limiting its own involvement in immigration enforcement in the interest of preserving a trusting and cooperative relationship with the community, the policies state.
“The expansion of these agreements enables ICE to further embed its enforcement presence within local jurisdictions, often circumventing community-driven policies against immigration enforcement,” the report states. “These partnerships not only divert local resources from community safety initiatives but also significantly heighten the risk of racial profiling and erode trust between law enforcement and immigrant communities.”
The ACLU has also found that between 2021 and 2024, the Wisconsin Department of Corrections (DOC), along with 29 counties, received over $7 million in federal funds through the State Criminal Alien Assistance Program (SCAAP). The ACLU states that the funds were “in exchange” for data sharing with ICE. Wisconsin Examiner reached out to DOC, the story will be updated with any reply from the the state agency regarding data sharing.
That data is just part of a growing immigration enforcement and detention network across the state. From Oct. 2021 to June 2025, according to the report, ICE sent over 3,300 immigration detainers to Wisconsin. These are situations in which ICE requests that a local jail hold individuals for up to 48 hours beyond their scheduled release, the ACLU report states. “Although these detainers are often not accompanied by a warrant signed by a neutral judicial official and lack authority under Wisconsin law,” it explains, “most sheriffs across the state continue to honor them.”
Although over 3,300 individuals have been held between Oct. 2021 and June 2025, the biggest jump in detainer requests occurred this year. Between Jan. 1 and June 10, there were 1,065 ICE detainers in Wisconsin. By comparison there were 942 ICE detainers during all of 2024, 853 detainers during a 12-month period between October 2022 and September 2023 and 474 in the 12 months before that.
“These numbers demonstrate that even without a judge-signed warrant, ICE continues to issue these ‘requests,’ and a significant number of Wisconsin jails continue to comply,” the ACLU’s report states. “This practice is problematic as federal deportation proceedings are civil, not criminal, matters and Wisconsin law does not provide legal authority for law enforcement to act on civil immigration detainers.”
Some sheriff offices are even taking it a step further than 287(g) and SCAAP. New financial agreements have also been arranged with counties such as Brown, Sauk and Ozaukee. In Brown County, the sheriff maintains a $90,000 contract for detention and transportation services, carrying a $70.00 per detainee, per day reimbursement, and another $36.00 per hour, with mileage and funding, for transportation services. Sauk County receives a $106.00 per-diem rate for housing ICE detainees, and Ozaukee County gave ICE the ability to purchase cell space in its jail by building off an existing contract with the U.S. Marshall Service. The ACLU calls this a “concerning trend” of local sheriffs “not only passively complying with ICE requests” but also “actively entering into benefiting from direct financial arrangements to house and transport immigrants for ICE removal activities.”
The report also highlights recent legislation which would require more cooperation with ICE. Republican lawmakers have introduced bills that would compel sheriffs to work with ICE regardless of their own priorities, mandate citizenship investigations of jail detainees, mandate compliance with detainer requests, and other policies.
To counter these advancements, the ACLU is calling on community members to reach out to their local sheriffs and police chiefs to learn more about where they stand on ICE cooperation, push agencies to prioritize community trust over obedience, and engage with lawmakers on the proposed bills.
“These cozy relationships between ICE and many sheriffs are disrupting our communities and funneling immigrant community members into the federal deportation machine,” said Muth.
ACLU report shows growth of Wisconsin immigration enforcement was originally published by the Wisconsin Examiner.
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