WASHINGTON (AP) -- A bipartisan group that includes former leaders of the FBI and Drug Enforcement Administration is calling for limits on authorities' use of GPS and other powerful technologies to track the movements of suspects.
The Constitution Project says police should be required to obtain a search warrant from a judge for any GPS surveillance that lasts more than 24 hours. And the group says a warrant always should be needed when authorities have to install a tracking device on a vehicle.
The group, which is a Washington think tank, outlined its views in a report being released Wednesday in advance of the Supreme Court's consideration of the issue in November.
The Obama administration says warrants aren't needed to track travel on public roads and would hamper law enforcement investigations.