On that matter, this article states Gorelick was in charge of oversight to INS:
Flow of Illegals at Mexican Border Reduced, Official Says
Los Angeles Times
WASHINGTON
http://www-tech.mit.edu/V114/N48/briefs1.48w.html (for full article)
The Justice Department's No. 2 official said Thursday that the Border Patrol, with the aid of the Defense Department, has sharply reduced the number of illegal immigrants coming across a formerly heavily traversed section of the California-Mexico border.
Deputy Attorney General Jamie Gorelick, returning from a two-day visit to the border south of San Diego, coupled her upbeat assessment with a prediction that the government will be able to "secure the entire southwest border."
Gorelick, whose responsibilities include overseeing the Immigration and Naturalization Service, described looking at sites where "people had been running across the border utterly unimpeded for years" and finding them "quiet." She provided no specific figures on the decrease, however.