Wonder if there is a back-up camera that can also record as the driver is backing up, I have the back-up camera on our 2010 Chevy-RoadTrek along with another back-up camera that I installed and I can operate at anytime. This camera is set at an angle so that I am able to see part of the rear and the passenger side.
I also have a back-up beeping alarm sound, and still people will walk behind the RT, drivers will still go by when I am backing up, folks just ignoring the beeping alarm and see me backing up.
If I would hit a pedestrian walking by as I was backing up, or I should strike a vehicle passing by my RT I would be at fault, with a back-up camera recording at least I would have some proof all though the driver is always at fault.
Note: I always try to back-up into a parking spot in a parking lot so that I can drive off instead of backing out.