I don't have any question that TallCoolOne might have been wronged, both if the car that hit him ran a red light and by the police officer who drove off with stopping to check on him or answer questions. But being wronged and having an actionable legal case are two very different things. That's often hard for people to hear, especially when they're mad.

What it sounds a lot more like Tall has is a justifiable complaint to the sergeant, lieutenant or captain of the traffic division of the police department that responded. By lodging that complaint to the right person at that PD, he might have the opportunity to review any dashboard cam footage from the patrol car and also to go on record about that officer not being as courteous as he should have been. Those things aren't grounds for a plaintiff's action, but good departments do listen to feedback like that when it comes in and note it down for when that officer's performance review rolls around.