There are a few things you can do to ruin a car without evidence. You can take it to a mechanic and have it fixed, you can drive it off the road, or you can just tell the truth and hope for the best. But there is one more way to ruin a car without evidence: You can tell your friends and family that your car is broken and needs to be fixed. This will get them interested in helping you out, and they will be more likely to do something about it if they think that their help is appreciated.