"Strawman"
Is this the word of the day? The phrase du jour? Did I miss the memo?
An investigation is just an investigation. You could assume that the FBI must have something of note or have a pretty good feeling if they're going to start an investigation concerning the defense department. On the other hand, I would expect to be considered innocent until proven guilty, so, I extend the same expectations to them.
Now, I can say that and almost totally believe that. However, I've come to trust my instincts when it comes to stuff like this. After all if it looks and smells like bullshit, well, you get the picture.
As for Greenhouse. I find it hard that anybody, especially in this politically charged up bubble that is the United States, doesn't have an agenda to push. This guy works in Washington. He's at least aware of the great game being played and probably dabbled in it a bit as well himself. There are no true altruists.