|I've had a car stolen from me. The lesson learned was never leave your keys in your car. When I leave my car, even stand beside it to pump gas, My keys are in my hand.|
In this case, someone, anyone getting in my car without my expressed permission, starting it and moving it has committed a feloney.
What can you do? I don't know. It seems it would be a he said, you said.
Just take your keys with you.