It might have made a difference to his family. Most like to to know "how a person died."
In N.Y. the family might want to know whether to sue the bus company or the driver of the approaching car. If he was the driver of the car and totaled that, then it becomes a moot point.
Such facts are of course necessary for the police who attend the scene of the accident, in the interests of record keeping and statistics.
Their documentation becomes useful when structural improvements are under consideration by City Hall or what ever planning authority, as to how to prevent similar accidents from re-occuring.
Therefore how Baron Rosen died becomes an important piece of information for quite a few citizens of N.Y.