Thieves amplify a vehicle's radio signal to access and copy the key fob signal to steal a vehicle. Here's how to block the signal.

The keyless car is a marvel of engineering. But how is it that they can start even when the battery in your key fob goes dead? The answer lies in science.

Your key fob emits an RFID signal that your car recognizes, allowing you to unlock the doors. When that signal is cloned, the car’s anti-theft system believes your legitimate key fob is nearby.

Police allege the three suspects in Montgomery County are using technology that allows them to clone key fobs to steal cars.