Supreme Court weighs geofence warrants

The U.S. Supreme Court is examining the constitutionality of 'geofence' warrants, a controversial law enforcement tool that allows police to obtain location data for every mobile device in a specific area.

Justices heard arguments in a case involving a robbery suspect identified through Google's location history database.

Critics argue these warrants constitute a 'digital dragnet' that violates the Fourth Amendment's protection against unreasonable searches.

The government maintains that the technology is a vital investigative tool and that users have no expectation of privacy for data shared with third parties.