Why aren't they in the process of prosecuting them already? Isn't that their duty?
My guess is the investigation is nearing completion on the leakers -- and there will be prosecutions. I think that all the bruhhah over the "sealed versus sealed" in the Libby case (Truthout saying that is a sealed indictment of Rove), is really an indictment of a leaker in either the CIA or the NSA story. I think Hoekstra's statement today is the beginning of releasing information regarding those indictments and punishment of the leakers. At least I hope so.
Be patient. There are lots of investigations ongoing.
Be patient.
[Why aren't they in the process of prosecuting them already? Isn't that their duty?]
It's utterly disgusting, isn't it. Unless, of course, they are currently under surveillance to see who is involved, etc.:)