In the most significant legal challenge to the Trump administration’s ongoing immigration enforcement blitz in Chicago, civil rights groups have alleged federal immigration agencies have illegally arrested and detained dozens of people, including some U.S. citizens, without probable cause.

Now, a federal judge is set to rule whether those arrests constituted violations of a consent decree in place since 2022 that bars U.S. Immigration and Customs Enforcement agents from making warrantless immigration arrests unless they have probable cause to believe someone is in the U.S. unlawfully and that the person is a flight risk.

Among those added as recent alleged violations: a family from Ecuador, including a 5-year-old girl, arrested in the parking lot of a Humboldt Park shopping center; a man

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