In early 2009 , they were arguing in court that they have the right to do this .
In the U.S. , police have planted hidden GPS tracking devices in people 's vehicles to monitor their movements , without a warrant .
In early 2009 , police were arguing in court that police have the right to do this .
In the U.S. , police have planted hidden GPS tracking devices in people 's vehicles to monitor their movements , without a warrant .