Here is an article about what the Justice Department intends to with updating their communications systems, now that they have cancelled the Integrated Wireless Network (IWN) project;
After IWN's cancellation, DOJ continues to push for radio modernization - FierceGovernmentIT
Contained in the body of the article is a link to a PDF file that was obtained from the Justice Department with some related (and some redacted) information on the future of DoJ communications.