A Husband & Wife were driving their Toyota car when it ran off fuel on the highway.
The man decided to take a lift and go to the nearest petrol pump. But before he left, he made sure that nobody was in the car with his wife, closed all the doors and windows and left.
When he came back, his wife was dead and there was stranger in the car.
No physical damage was done to the car, so how did the Stranger get inside??