Enterprise Rent-A-Car

I rented a car in Chamblee, GA (Nov 28-29) for a 24 hr period while my car was being repaired. Went shopping, went out to dinner, and returned the car first thing in the morning. The agent took a look at the car and said I had damaged a piece of plastic on the bumper. I responded that I had no knowledge of any damage. He reminded me that I looked at the vehicle before leaving and did not bring it to his attention. I told him that you have to lean over to see the plastic in question, molded into the bumper. It is a reflector. He then told me he could show me pictures of the vehicle that would show the damage was not there when I left. After 45 minutes of waiting, he could not come up with any pictures. He said I would be contacted by Damage Recovery. I told him that since he could not produce any pictures proving the car was intact, I should not be held liable