GPS technology doubles as crime-fighting tool

The units can place a suspect at a crime scene, undermine an alibi or prove fault in an accident. And though privacy rights advocates don't like the intrusion, courts tend to side with authorities. In their cocoons of leather upholstery, soothing high-tech sound systems and automatically activated personal seat settings, drivers have come to regard their car interiors as mobile extensions of the homes that are their private refuges.

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