The US Court of Appeals in Washington ruled earlier this month that police cannot track a suspect using GPS technology without a warrant, tossing out the conviction of a man arrested for drug dealing.

The three-judge panel concluded that the use of GPS, or Global Positioning System tracking, was a violation of the constitutional guarantee in the Fourth Amendment of unreasonable searches and seizures, saying it was an "intrusion" into "private affairs."

"This case itself illustrates how the sequence of a person's movements may reveal more than the individual movements of which it is composed," the court said.

Source: Space Daily