Sibel Edmonds, meet Valerie Plame Wilson

Times Online (UK):

The FBI has been accused of covering up a key case file detailing evidence against corrupt government officials and their dealings with a network stealing nuclear secrets.

The assertion follows allegations made in The Sunday Times two weeks ago by Sibel Edmonds, an FBI whistleblower, who worked on the agency's investigation of the network.[..]

One of the documents relating to the case was marked 203A-WF-210023. Last week, however, the FBI responded to a freedom of information request for a file of exactly the same number by claiming that it did not exist. But The Sunday Times has obtained a document signed by an FBI official showing the existence of the file.

Edmonds believes the crucial file is being deliberately covered up by the FBI because its contents are explosive. She accuses the agency of an "outright lie".[..]

The anonymous letter names a high-level government official who was allegedly secretly recorded speaking to an official at the Turkish embassy between August and December 2001.

It claims the government official warned a Turkish member of the network that they should not deal with a company called Brewster Jennings because it was a CIA front company investigating the nuclear black market. The official's warning came two years before Brewster Jennings was publicly outed when one of its staff, Valerie Plame, was revealed to be a CIA agent in a case that became a cause célèbre in the US.