I didn't leave my possession. I just owned a car that someone else left.

But is it illegal to own a car that someone else parked in the wrong pkace?

No. Running a red light is when your possession crosses an intersection while the light is red, and should apply to the registered owner.

If someone used the car without permission, they are guilty of theft.

If they used the car with your permission, you should either be responsible for what they do with it, or be able to point to the person who was using it.