Those arrested face 60 to 90 days in jail and eventual deportation. Daines said an immigrant convicted of four felonies would not be able to re-enter the United States.

According to one of the affidavits, a Swift worker used documents containing the personal data of someone who was actually in jail in Illinois

Investigators also said that in October, ICE agents took photos of vehicle license plates in the Hyrum plant's parking lot to check registrations. The agents discovered that 23 Swift employees had two different sets of identification documents, one to work at the plant and another for their drivers' licenses.

Chertoff said Congress needs to revise Social Security rules to catch if a number is used more than once or if a number is being used by more than one person.

Swift had been using a basic program that checks to see if the Social Security numbers used by applicants are real. In the past, using fake Social Security numbers had been the problem, but now illegal immigrants are using real Social Security numbers. A number checks out to be real, but the system does not determine that it belongs to someone else.

Chertoff said while the departments waits for Congress to revise the rules or develop a temporary worker program, these raids are one way the government can stop illegal immigration and the corresponding identify theft.

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