"The Department of Homeland Security, continuing its crackdown on
employers who hire [unauthorized] immigrants, has ordered hundreds of companies
in recent weeks to submit their hiring records for inspection. This year's first "silent raids"
haven't been publicly announced by Immigration and Customs Enforcement,
the DHS agency that conducts them. But an ICE spokeswoman confirmed on
Tuesday that as of March 29, the agency had notified 500 businesses "of
all sizes and types" to turn over I-9 employment-eligibility forms and
other documents for audits." - Wall Street Journal, May 2, 2012.
[Note: If the link takes you to the paywall, play around with news.google.com; sometimes you can get an "article free pass" to get behind the WSJ paywall and see the full article.]