Four Democratic lawmakers asked the Government Accountability Office to investigate.

So far, no one has made a claim of responsibility.

If a company is done with an employee, guest workers often find themselves stranded in the U.S. without a job. After five years as an H-1B, employers are required to start paying social security, so the worker becomes less attractive. When the job is over, so is the visa, making them into illegals. Their staffing company may h