The much-publicized detention of a University of Utah student by immigration authorities in western Colorado in June was part of a wave of allegedly warrantless and illegal arrests of immigrants across the state this year, according to a lawsuit filed Thursday in federal court.

The suit, the latest local challenge to the Trump administration’s immigration crackdown, asks a Denver-based federal judge to bar U.S. Immigration and Customs Enforcement agents from summarily arresting people without first assessing whether an arrest is necessary because the person is likely to flee, as is required by federal law.

The immigrants serving as plaintiffs argue that ICE agents in Colorado have routinely violated that requirement, including during prominent raids this year in Aurora and Colorado Sprin

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