If you go through tin foil like there's no tomorrow (or because you think there's no tomorrow), you might want to head down the store. A recent 2 - 1 ruling by the Sixth Circuit Court of Appeals has determined that law enforcement agencies can obtain cellphone location data, without the need for a warrant. The decision comes after a defendant in a drug-related case claimed protection from his phone's GPS location data being used under the Fourth Amendment. Judge John Rogers stated that the defendant didn't have a reasonable expectation of privacy for data given off by a voluntarily purcha