(Newser) – The latest in the ongoing and complex David Petraeus sex scandal: The FBI is investigating how Paula Broadwell got her hands on classified files found in her home during a late-night search Monday, reports the Washington Post. Officials say there's no evidence that Petraeus was the source of the documents, and urge the media not to label it as a full-blown national security investigation, but one official says that “the issue of national security is still on the table." And we probably haven't had our last surprise in the scandal: "My immediate gut is like this is the National Enquirer,” says Sen. Dianne Feinstein. “I mean, every day there is something new.”