Of all of the recent technological developments that have expanded the surveillance capabilities of law enforcement agencies at the expense of individual privacy, perhaps the most powerful is cell phone location tracking. And now, after an unprecedented ...

The American Civil Liberties Union (ACLU) and the Electronic Frontier Foundation (EFF) are asking a federal court to order the U.S. Department of Justice to turn over records about the agency’s tracking of mobile phone users. The two civil liberties ...

Many law enforcement agencies across the U.S. track mobile phones as part of investigations, but only a minority ask for court-ordered warrants, according to a new report released Monday by the American Civil Liberties Union. More than 90 law enforcement ...