
“A federal appeals court on Wednesday said the authorities do not need a probable-cause warrant to track a suspect’s every move via GPS signals from a suspect’s mobile phone. The decision, a big boost for the government’s surveillance powers, comes as prosecutors are shifting their focus to warrantless cell-tower location tracking of suspects. The court of appeals ruling comes a month after a congressional inquiry found that law enforcement made 1.3 million requests for cellphone data last year alone while seeking out subscriber information like text messages, location data and calling records.”
http://www.wired.com/threatlevel/2012/08/warrantless-gps-phone-tracking/






