AP — Chicago’s top federal prosecutor abandoned a closely watched case Thursday against four activists who protested outside a federal building during last year’s immigration crackdown in the city, after a judge scrutinized allegations of grand jury misconduct by the prosecutor’s office.

U.S. Attorney Andrew Boutros announced the decision to dismiss the remaining charges in court following a closed-door meeting over redacted grand jury transcripts. He told U.S. District Judge April Perry he was unaware until recently of the alleged misconduct, including a prosecutor meeting with a grand juror outside proceedings and other jurors who disagreed with the case being dismissed prevented from participating.

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