A cleaning firm employing illegal immigrants cleaned the home of Michael Chertoff, Secretary of Homeland Security, according to a report in the Washington Post today.

Apparently the workers employed by a cleaning service were regularly screened by the Secret Service, yet cleared the screening process.

The cleaning service had been contracted by Chertoff’s wife, and was terminated earlier this year after it was disclosed to the Chertoffs that the service had hired illegal immigrants.

DHS Immigration and Customs Enforcement division fined the cleaning service in February for violations related to improper filing of employee citizenship information. It’s not clear from the Washington Post story article why this enforcement action did not gain public attention for nearly ten months.