A federal grand jury in Iowa returned a 12-count indictment against kosher slaughterhouse Agriprocessors and some of its employees Friday, on charges ranging from conspiracy and harboring illegal immigrants to bank fraud. The Agriprocessors plant in Postville was the site of one of the nation's largest immigration raids in May. The indictment included three new defendants who haven't previously faced federal charges in connection with the plant. The indictment was issued Thursday and unsealed on Friday. The indictment listed charges including conspiracy to harbor undocumented immigrants for profit, harboring and aiding and abetting undocumented immigrants for profit, conspiracy to commit document fraud, aiding and abetting document fraud, aiding and abetting aggravated identity theft and bank fraud. Federal immigration agents arrested 389 workers after the May raid.