How can you prove if a small item flew out of the back of a pick up truck and hit your windshield?

[lander42]

Colorado
How can you prove if a small item flew out of the back of a pick up truck and hit your windshield?

I took the license number as i got close but now what? How can I prove what I saw happen, or is just my word enough.

I want the guy to pay for the windshield damage, if I can.

[adjusterjack]

Start with your local Motor Vehicle Department office and see if they'll release the owner's information. If they don't (and they have no obligation to do so) you'll have to get the police involved. If the police have no interest in pursuing the matter, or you do find the owner and he tells you to get lost, you buy yourself a windshield (or use your insurance) just like the rest of do when the windshield gets cracked by a flying pebble.