Lovely. "Don't have a clue," huh? Aren't there INS or customs records of American citizens who have recently visited Pakistan or neighboring countries? Shouldn't there be?
I don't think their anti-discrimination philsophy holds true when dealing with other groups. Guilt by association is the typical SOP for the FBI (e.g., Branch Davidians, Ku Klux Klan, FALN, Black Panthers, Randy Weaver's family and friends, various militia groups, Terry Nichols, the SLA, the list goes on and on).
Suggestion...the first place that I would look would be in Hillary's closet.