If you search the Wash Posts site about the topic, there are several stories giving background on this...namely 2005/6 stuff.
and this from wikipedia:
The town of Herndon was part of a nationally reported controversy involving illegal immigration beginning in 2005. The controversy revolved around a day labor center called the Herndon Official Worker Center (HOW Center), constructed by the town and operated by Reston Interfaith's Project Hope and Harmony under a grant from surrounding Fairfax County. The HOW Center was created in response to daily gatherings of Hispanic workers at a local 7-Eleven store and resulting allegations of gang activity, public drunkenness, and public urination. What had started as a local issue became national news when the Minuteman Project anti-illegal immigration group joined the local groups opposing the day laborers and watchdog group Judicial Watch sued the town and county to block the center's construction. The HOW Center opened in December 2005, on the site of the former Herndon Police headquarters. The 2006 election for Mayor and Town Council revolved mainly around the issue, and resulted in unseating the pro-center Mayor and two councilmembers. The center closed after less than two years of operation, in September 2007. The Town Council had demanded that any operator of the day-labor center check the laborers' identification, and a subsequent court decision required the town to open the center to all workers. The Town Council chose instead to close the center entirely.