An airport detention that ignited state-federal tension
November 6, 2026 · 10:30 p.m. Central / 11:30 p.m. Eastern
A 21-year-old sworn Wisconsin State Patrol trooper was confronted, handcuffed and placed in leg shackles by federal immigration agents at Dane County Regional Airport in Madison, sparking an immediate legal clash between state employment authorities and the Department of Homeland Security, officials confirmed Friday.
The trooper, identified as Carel Aaron Van Der Merwe, was detained on Thursday afternoon while waiting at a departure gate to board a domestic flight to visit his parents in New Mexico. Van Der Merwe was transported in custody to the Dodge County Detention Facility in Juneau, Wisconsin, as reported by FOX6 News Milwaukee, CBS 58 and FOX 9 Minneapolis.
The high-profile arrest has drawn national attention because Van Der Merwe was hired by the state patrol under Wisconsin law, successfully graduated from the police academy, and holds a federally issued work authorization card valid through 2030, despite an unresolved asylum claim.
The legal collision between state service and federal status
According to his attorneys and public records, Van Der Merwe immigrated legally to the United States from South Africa with his family in March 2019 when he was 14 years old. The family fled South Africa due to documented safety threats surrounding violence against rural farm communities and promptly submitted applications for political asylum.
While that asylum petition has remained bogged down in federal immigration backlog for over seven years, U.S. Citizenship and Immigration Services (USCIS) repeatedly renewed Van Der Merwe’s Employment Authorization Document (EAD), granting him lawful federal permission to work through 2030.
In July 2025, after passing background checks, physical readiness evaluations and psychological screenings, Van Der Merwe joined the Wisconsin State Patrol. Under Wisconsin statute, noncitizens who possess valid federal work authorization and demonstrate legal presence are fully eligible to serve as state law enforcement officers. He was assigned to the patrol's Tomah post and resided in Onalaska.
U.S. Immigration and Customs Enforcement (ICE) presented a starkly different legal theory. In a statement released Friday, DHS stated that Van Der Merwe entered the country on a temporary visitor admission that expired in September 2019, designating him as an alien subject to administrative removal. DHS officials asserted that an unadjudicated asylum claim and a work permit do not confer lawful permanent residency status, justifying targeted enforcement.
Reporting and reaction on X
Wisconsin investigative reporters and legal correspondents reported on Trooper Van Der Merwe's airport arrest and emergency release on X.
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