If not for the fact that they had found a bunch of license plates in the commercial vehicle involved in the accident, the investigation would have taken an even longer time.
"The accident was extremely serious. Of the two vehicles involved, one of them was a Volkswagen Santana in which the driver died on the spot. According to the vehicle record, the driver should be the only person in the vehicle at that time. The other vehicle was the commercial vehicle ferrying your sister. The driver too has passed away. There was an accompanying medical staff who is currently unconscious. We deduce that the three of them should be the only people on the vehicle."