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The ACLU of Colorado is suing federal immigration officials over alleged unlawful arrests of immigrants.

A Brazilian immigrant living in Utah who was detained by immigration authorities for 15 days in Colorado last June is one of the plaintiffs.

Federal officials rebuffed the charges, saying immigration agents haven't been engaging in "indiscriminate stops."

DENVER — The American Civil Liberties Union in Colorado is suing federal immigration officials on behalf of a Brazilian immigrant in Utah and several others, saying their arrests underscore what the civil rights group believes to be "illegal and discriminatory" behavior by immigration authorities.

The experiences of Caroline Dias Goncalves and three others singled out in the lawsuit

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