Crackas With Attitude (CWA) claims it has gained access to a Law Enforcement Portal through which one can access: arrest records, information about terrorist events and active shooters. The system in question is reportedly known as the Joint Automated Booking System (JABS), which is only available to the Federal Bureau of Investigation (FBI) and law enforcement. Also says it has access to another tool that is something like a real-time chat system for the FBI to communicate with other law enforcement agents around the US.
Source: https://thehackernews.com/2015/11/hacking-arrest-record.html