Ping
A case is solved when investigators figure out who did it. A case is closed when prosecutors convict the culprit in a court of law. Since Bruce Ivins is dead, there is no way to convict him in a court of law, so closing the case requires something different in this situation.
My feeling is that the grand jury is still investigating, and the FBI is checking out what they are being asked to check out by the grand jury. I'm hoping that the grand jury will produce a report that shows all the evidence against Ivins and includes the grand jury's findings that Ivins was the sole culprit. That would be a lot better than just having the FBI and DOJ say that Ivins was the culprit.
A grand jury's findings will still be only one side of the legal case. But it should be the entire case for the prosecution against Dr. Bruce Ivins. So far, we've just seen bits and pieces, often from unidentified sources.
Presumably, there will also be some kind of Congressional hearing or investigation of the case. But, clearly that isn't going to happen until after the election. And, if the grand jury is still investigating, any Congressional investigation MUST wait until the grand jury is done.
Meanwhile, of course, everyone is entitled to their opinion.