No, based on what you write, you have no viable or valid lawsuit. The officer did not run you over; the officer did not cause or contribute to your injuries. Whether he interviewed you or stayed at the scene or not, you would have been hurt as badly; would have needed the same medical care and therapy; would have had the same bills; would still be unable to work; etc. The officer did not cause your injury or losses, and thefore you cannot sue the police