LATE at night, two hooded men lurk in a driveway in Solihull. One hovers near a parked Mercedes-Benz, as the other stands by the front door, waving around what looks like an iPad. He is trying to pick up a signal that the car's fob emits from inside the house. That is then pinged to the other crook, who uses it to unlock the driver's door and start the engine. The cctv footage of this "relay crime", released by West Midlands Police in November, lasts about a minute. That is all the time the thieves needed.
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