Re: My Son Was Hit by a Truck and Didn't Provide Information. What Are the Parameters
If your son stated he was not injured to the driver that hit him then the event does not qualify as a collision. Therefore the driver has no obligation to provide any information to your son and he was ok to leave the scene. There is no hit and run in the way you describe the events.
If your son claims injury after the fact the driver still cannot be charged with hit and run because of the fact that you say your son said to him he was ok. If your son had injuries after the fact the police could still take a standard collision report to document the event.
If your some wan not injured at all then you should (need) to drop the issue. I understand as a parent that you want justice for your son being hit by a car but by the way you described it, there is no justice to be served.
I'm a cop. My opinion does not reflect the views or opinion of my agency. That being said, "Do not argue with an idiot. He will drag you down to his level and beat you with experience."