If you're referring to people who are in the country illegally, no. The department knows the number of warrants that are outstanding against individuals, ordering them to leave the country. That database contains 63,000 names. Some of those people may no longer be in the country. They may have left voluntarily and not informed the agency. And the agency knows the whereabouts of 22,000 individuals.
On May 8th, 2008. See this statement in context.