In the months leading up to the May 2008 raid on an Iowa slaughterhouse, U.S. District Judge Linda Reade in Cedar Rapids participated in a series of meetings with law enforcement agents and prosecutors, government memos show.

Immigration officials and prosecutors, preparing for an enforcement action that would generate national attention, briefed the judge — sometimes at her request — on a variety of topics, including charging strategy and the number of anticipated cases against undocumented workers, according to memos and e-mails released by prosecutors and federal agents. The records were produced in a response to a defendant’s records request.