Consider the death of Princess Diana. This accident involved an English citizen, with an Egyptian boyfriend, crashed in a French tunnel, driving a German car with a Dutch engine, driven by a Belgian, who was drunk on Scotch whiskey, followed closely by Italian paparazzi, on Japanese motorcycles, and finally treated with Brazilian medicines by an American doctor. In this case, even leaving aside the fame of the victims, a mere neighborhood canvass would hardly have completed the forensic picture, as it might have a generation before.