[JustPiper]

Employers are required to check forms known as I-9's, filled out by every new employee, and keep the forms for a specified period of time. An employer can face civil and criminal penalties for knowingly hiring illegal immigrants or failing to comply with the I-9 regulations.

[CSM]

"The workers, members of cleaning crews that the company hired through a contractor.."

"They are (employed by) outside contractors; they're not Wal-Mart associates," Williams said."