While Sheriff Joe Arpaio in Phoenix gets all the media attention for his crackdown on illegal immigrants, eight deputies in an unremarkable office at the Harris County Jail are posting similar numbers for deportation -- and doing so without controversy.

Working two per shift, the deputies refer roughly 1,000 suspected illegal immigrants to federal Immigrations and Customs Enforcement (ICE) authorities every month, helping to make the Southern District of Texas by far the busiest in the nation for illegal-immigration prosecutions.