The American FBI is increasingly asking courts to authorize surveillance by mobile phones, according to the Washington Post. Specifically, what the agency requests is permission to locate a suspect, either by identifying nearest cell phone tower or, more precisely yet, through the E911 channel. One danger:
In some cases, judges have granted the requests without requiring the government to demonstrate that there is probable cause to believe that a crime is taking place or that the inquiry will yield evidence of a crime. Privacy advocates fear such a practice may expose average Americans to a new level of government scrutiny of their daily lives.
Read more - 'FBI increasingly tracking people by cell phones'