There's no mystery. The thieves monitor the radio frequency car remotes use and record the remote's signal. Then they process what they've received to be able t

There's no mystery. The thieves monitor the radio frequency car remotes use and record the remote's signal. Then they process what they've received to be able to mimic the remote adequately to fool the car's receiver. All the thieves need to do is be near the car when the owner activates the legitimate remote, to pick up the remote's radio signal. Once they have the handshake between the car and the remote, they're in. Elementary, my dear Watson.