Wal-Mart has acknowledged receiving a target letter from the Government advising that a federal grand jury will be investigating accusations that it violated immigration laws. The New York Times reports:

...two federal law enforcement officials said in interviews that Wal-Mart executives must have known about the immigration violations because federal agents rounded up 102 illegal immigrant janitors at Wal-Marts in 1998 and 2001. In the October raid, federal agents searched the office of an executive at Wal-Mart's headquarters, carting away boxes of papers. Federal officials said prosecutors had wiretaps and recordings of conversations between Wal-Mart officials and subcontractors.

The use of illegal workers appeared to benefit Wal-Mart, its shareholders and managers by minimizing the company's costs, and it benefited consumers by helping hold down Wal-Mart's prices. Cleaning contractors profited, and thousands of foreign workers were able to earn more than they could back home.

But the system also had its costs — janitors said they were forced to work seven days a week, were not paid overtime and often endured harsh conditions. Foreigners got jobs that Americans might have wanted. And taxpayers sometimes ended up paying for the illegal workers' emergency health care or their children's education in American schools.

On the human side, the article has the story of Pavel, one of the undocumented workers: