I hate it when that happens.
I have my foil hat on..The " small accident" was to get him out of his car. What "kind " of an accident was it?. If it was a one car "minor"accident why did he get out of his car on a bridge? Where is the other car and driver? Where did the other driver and witnesses go? Is it possible that the "accident " happened elsewhere and the car and body moved there? Was there water in his lungs? It would seem to me that the bridge would always have traffic on it..
This sounds like Vince Foster to me