A Virginia-based law enforcement data sharing ring, which allows signatory police agencies to share and analyze seized “telephone intelligence information,” was first proposed by federal prosecutors, according to new documents obtained by Ars. Federal involvement suggests that there could be more such databases in other parts of the country.

“It’s unsurprising to see the feds encouraging local law enforcement agencies to create these localized databases,” Hanni Fakhoury, a staff attorney with the Electronic Frontier Foundation, told Ars. “In fact, there’s a whole division within the Department of Justice that focuses on educating and advancing local law enforcement interests, the National Institute of Justice. And so I would imagine there are others.”

As Ars reported last month, according to a memorandum of understanding (MOU) first published by the Center for Investigative Reporting, the police departments from Hampton, Newport News, Norfolk, Chesapeake, and Suffolk all participate in something called the “Hampton Roads Telephone Analysis Sharing Network,” or HRTASN.