Its also obvious that the FBI did not look and see what other government/military agencies are using. The FBI is not the only agency that needs to be secure.
I'm sure they are of the mindset that they need a "different" software when one might already be made and just needs to be modified.
Actually, a lot of software developed for the U.S. government appears to be "single use" and is often locked down pretty tight in terms of where and how it is going to be used.
What the U.S. government needs to do is develop a high level, object oriented API toolbox for developing a secure, modular systems for storing and recalling content in government databases. The front end application would merely be an interpreter for the high level code, much like a web browser... In fact, it could be a web browser designed and compiled to work with enhanced security protocols for the new toolbox.
That would be an interesting aspect of a special, secure browser for accessing secure government database applications. By default, if a browser can't convince the database application that it is a secure browser, its access to the database would be limited automatically, regardless of what access level the user may have usually.