Dreeben cited United States v. Knotts as an example where police were allowed to use a device known as a "beeper" that allows the tracking of a car from a short distance away. Chief Justice Roberts distinguished the current case from Knotts, saying that using a beeper still took "a lot of work" whereas a GPS device allows the police to "sit back in the station ... and push a button whenever they want to find out where the car is."
Dreeben cited United States v. Knotts as an example where police were allowed to use a device known as a "beeper" that allows the tracking of a car from a short distance away. Chief Justice Roberts distinguished the current case from Knotts, saying that using a beeper still took "a lot of work" whereas a GPS device allows the police to "sit back in the station ... and push a button whenever they want to find out where the car is."