I think in most places - especially these days, for minor things like getting backed into and the person then taking off, or having a rock thrown at you, even with the footage, cops will usually do exactly nothing especially if you can't clearly see the other person. Maybe it can help for insurance, even if there's no police assist? I only got mine to protect against major things, like the cut in front of you and then reverse into you and claim rear ended injury scam, or getting creamed by someone running a light, etc.