The Judith Miller story is more than a little odd (See here for a complete account of the affair). Miller, you will recall went to prison rather than reveal her sources for a story - which she never wrote - on the matter of how Valerie Plame's identity as a covert operative for the CIA came to be made public.
The source she was ostensibly protecting was Dick Cheney aide Scooter Libby, but Libby told her over a year ago that she had his permission to testify about any conversations she had had with him.
He then wrote a letter last month repeating his permission to reveal anything she wanted to the grand jury investigating the matter. Even so, she chose to remain in jail for another ten days before agreeing to testify.
Why? PowerLine has the details of the story and offers these three possibile answers to the question:
Whatever the answer her behavior is strange, and it will be interesting to see what she has to say to the grand jury. Our hunch is that this investigation is going nowhere, at least nowhere that the enemies of Karl Rove would like to see it go. All of the excitement that rippled through the MSM last spring and summer as they eagerly anticipated seeing Rove brought low and maybe even led out of his office in leg irons, has evaporated away like a morning mist. Just another case of a great deal of left-wing sound and fury signifying nothing. Next up, Tom DeLay.