Police in Florida have offered a startling excuse for having used a controversial “stingray” cellphone tracking gadget 200 times without ever telling a judge: the device’s manufacturer made them sign a non-disclosure agreement that they say prevented them from telling the courts.
he secretive technology is generically known as a stingray or IMSI catcher, but the Harris device is also specifically called the Stingray. When mobile phones — and other wireless communication devices like air cards — connect to the stingray, it can see and record their unique ID numbers and traffic data, as well as information that points to the device’s location. By moving the stingray around, authorities can triangulate the device’s location with much more precision than they can get through data obtained from a mobile network provider’s fixed tower location.
“No, no, no, no, no,” he said. “I think this record makes it very clear they were not going to get a search warrant because they had never gotten a search warrant for this technology.”
http://www.wired.com/threatlevel/2014/03/stingray/