Mr. Buck, though, said the cases stemming from the inquiry are about identity theft, not immigration.
The Barclays case is the first major action stemming from the inquiry into how big banks set major benchmarks like the London interbank offered rate, known as Libor.
The formal notice, stemming from an inquiry into Ms. Stewart's sale of nearly 4,000 ImClone Systems shares last December, came on Sept. 12, the person said.
He pleaded not guilty to obstruction charges stemming from the inquiry into the disclosure of the identity of a C.I.A. officer, Valerie Wilson.
In his report, Lord Fraser set out a number of recommendations stemming from the inquiry.
Last month, HSBC told investors it had set aside $1.5 billion to cover fines or penalties stemming from the inquiry and warned costs could be significantly higher.
The Barclays case is the first major action stemming from a multiyear inquiry into rate-rigging that has ensnared more than 10 banks.
The security representative asked me a series of searching questions and came back two weeks later for another session of questioning, stemming from their inquiries into my previous answers.
The reassignment is the second this week stemming from inquiries in the court there, and court officials said they expect several more soon.
Several investigations stemmed from the inquiry into Michael D. Cohen, Donald J. Trump's former personal lawyer.
The case, announced in 2010, stemmed from an inquiry by the city's Department of Investigation, which referred its findings to Mr. Bharara's office.
