REUTERS/Edgard GarridoA chemistry professor at the University of North Texas has invented the world's first drug-sniffing car, a vehicle capable of detecting trace amounts of illicit substances in the air and then pinpointing the exact location of the source on a map. Dr. Guido Verbeck created the prototype by equipping a silver 2015 Ford Fusion Energi hybrid sedan with an advanced mass spectrometer, and tested his invention by setting up a fake meth lab in a mobile home and emitting drug fumes through the vents. From a distance of a quarter-mile, the car could locate the source of the fumes within a radius of 15 feet, according to Verbeck. "When certain types of chemical strains are detected, the computer kicks on and starts calculating where that strain is coming from," he said.