The US Department of Justice is trying to obtain a warrant capable of forcing the release of incriminating fingerprint device in the investigation.
After the case Apple Vs. FBI are so many questions and issues related to security and privacy. From what appeared to Forbes, the DOJ would then have the option to request a warrant to access the device involved in the investigation. Not only fingerprint, also unlock code or password. All that will come in handy during an investigation.
The reviews you read online are already mixed as some believe that this can be a security measure and that it will help in future investigations and who believes that having a mandate to investigate and figure out if a person is to consider suspect is an act of abuse of power.
We will update if we learn more.