A Washington Post article considers the privacy implications of increasing use of GPS technology by U.S. police in investigative pursuits:
Across the country, police are using GPS devices to snare thieves, drug dealers, sexual predators and killers, often without a warrant or court order. Privacy advocates said tracking suspects electronically constitutes illegal search and seizure, violating Fourth Amendment rights of protection against unreasonable searches and seizures, and is another step toward George Orwell's Big Brother society. Law enforcement officials, when they discuss the issue at all, said GPS is essentially the same as having an officer trail someone, just cheaper and more accurate. Most of the time, as was done in the Foltz case, judges have sided with police.
Wth the courts' blessing, and the ever-declining cost of the technology, many analysts believe that police will increasingly rely on GPS as an effective tool in investigations and that the public will hear little about it. Last year, FBI agents used a GPS device while investigating an embezzlement scheme to steal from District taxpayers, attaching one to a suspect's Jaguar.
...Barry Steinhardt, director of the American Civil Liberties Union's technology and liberty program, considers GPS monitoring, along with license plate readers, toll transponders and video cameras with face-recognition technology, part of the same trend toward "an always-on, surveillance society."
"Things that would have seemed fantastic 15 years ago are now routine," he said. "We have to rethink what is a reasonable expectation of privacy."
So far, the U.S. Supreme Court has not weighed in on unwarranted GPS tracking, but supporters point to a 1983 case that said police do not need a warrant to track a car on a public street with a beeper, which relays the car's location to police.
Lower courts that have addressed the issue have not all agreed. The Washington state Supreme Court has ruled that police must obtain a warrant to use the device in that manner, but courts in New York, Wisconsin and Maryland, and the U.S. Court of Appeals for the 7th Circuit in Chicago, have held that a warrant is not necessary.
- Garry J. Wise, Toronto