Honestly if there's no injury, the police aren't going to care too much about damage to your car. They figure you're insured, so you'll be taken care of.
In most cities they have bigger fish to fry and a car accident with no injuries is just not that important. I don't think they're entirely wrong.
Contacted the police, took them about an hour to respond, and the officer gave me his email so I could send him the video. It was hard to make out but you could definitely see the object leave the truck, and a few seconds later appearing in my view, and me swerving.
Contacted insurance, they arranged the repairs, and I was out the deductible. About a week later I got a call from the police saying they looked up the plate and lo and behold, it wasn't even registered to a white pickup truck, but a blue sedan, so the plate was either stolen or swapped from another vehicle, at which point there really was no recourse.
Long story short, even if you have a dash cam, sometimes you're SOL. I _did_ use that as an excuse to upgrade my dash cam to one with better quality and night vision, but yeah, shit happens, and if nobody got hurt sometimes you gotta just accept it.
Assuming you have fault based accidents and can sue for the full cost, again the guys a deadbeat. I don't think this is the money saving idea that it seems. I'm not sure what you're hoping to accomplish, honestly.
Quite simple: Explain how you would have benefited at all, or why you were SOL. It sounds like the outcome could not have been improved... I guess maybe you think that there's a better chance of the person getting caught.
Are you just sad they weren't able to put someone in a cage, even though there's no financial impact on you whatsoever.
Most dashcams can track speed too. When I was shopping for a dashcam, many of the reviews/comments said that the first thing they do when configuring their new dashcam is turn off the speed caption (sure it can still be calculated from the visuals if needed, but that's a lot more work). Last thing you want when you're using dashcam video to show someone else was at fault in an accident is their insurer to say that you were 2mph over the speed limit and therefore partially liable.