If you’ve been the victim of a car key theft, there are a few things you can do to try and prove that someone keyed your car. The first thing you can do is take pictures of the damage to your car. If the thief left any evidence behind, it may be in these pictures. Next, you can try and track down the person who keyed your car. If they have a driver’s license or other identifying information, you may be able to track them down this way. Finally, if all else fails, you can file a police report and hope for the best. ..