A police person is on a motorcycle on the side of a street.
A policewoman is sitting on the motorcycle behind the parked car.
There is nothing to indicate that it is a woman, or that they are behind the parked car
A police officer can stay not only behind parked car
We have no idea if it is a policewoman, it might be a policeman. We have no idea if they are behind a parked car, they could be on the side of the road for a number of reasons.