Words by the NY Post:
Pervasive government surveillance might be virtually expected by this point, but in theory, there’s a robust legal system to deal with cops surveilling citizens. Law enforcement agencies are supposed to get a warrant and serve that to cellphone companies, who then provide the data.
But according to a New York Times report, a company that primarily deals with prison phone systems has leveraged a data-sharing service offered by phone carriers to allow cops to track any cellphone number, with no legal checks in place to stop it being abused.
Read the full report here: https://www.nytimes.com/2018/05/10/technology/cellphone-tracking-law-enforcement.html