Cops Need a Warrant to Grab Your Cell Tower Data, Florida Court Rules

The Florida Supreme Court ruled Thursday that obtaining cell phone location data to track a person’s location or movement in real time constitutes a Fourth Amendment search and therefore requires a court-ordered warrant.
But the way the ruling is written (.pdf), it would also cover the use of so-called “stingrays”—sophisticated technology law enforcement agencies use to locate and track people in the field without assistance from telecoms. Agencies around the country, including in Florida, have been using the technology to track suspects—sometimes without obtaining a court order, other times deliberately deceiving judges and defendants about their use of the devices to track suspects, telling judges the information came from “confidential” sources rather than disclose their use of stingrays.
http://www.wired.com/2014/10/florida-court-requires-warrant-cell-tower-data/