They are described as the ‘worst of the worst.’

Before dawn in northern Virginia, after days of heavy surveillance, the Immigrations and Customs Enforcement Fugitive Operation Team is taking a 42-year-old man from el Salvador into custody.

The man, a green card holder, is eligible for deportation because he was convicted of sexually assaulting a minor. FOX News is told the man’s parole officer provided homeland security with the lead.

“We don't do sweeps, we don't do raids. We are looking for specific individuals who have been convicted of crimes who are not supposed to be here, do not lawfully reside in US,â€