From the investigator's point, 1) it hadn't been solved, and 2) leaking is not a "second and subsequent leakers get a pass" crime.
I totally agree, not only was there no need to query Libby, there was no justification for investigation. Not on a "who leaked" reason, but on a no crime if everybody leaked basis. Fitzgerald didn;t want to probe that end first (was Plame covert), he went frpom the other end for political reasons.
This the nature of law. The players and the system are dishonest. Lesson? Break the law. It's all about force, not about rules.
Haha! I know... framed for a crime some years ago [someone wanted my house et al.] First day - no atty phone call allowed - at arraignment the judge declared me guilty. Ha! Then the local prosecutor found out he had no case and moved to drop charges. The state's atty asked if I had made bail; the local pros said 'no'... state atty said, 'Keep him in jail; I will take the case.'
Not the first time I have had to represent myself in court, and have yet to lose a case. Yes, the law in this country is for the rich... I am a pauper, which is why I won. The state atty offered me a deal or 15 years in state prison. I just laughed and pointed out that I was broke and in poor health, that he offered me no threat but rather paradise. But I told him I was innocent, to get his ducks in a row and I would see him in court.
He dropped the charges. Much later he also failed to convict Casey Anthony of killing her child. Yeah, something is wrong with the law in this country and one just has to know how to play the 'game'.