 Preliminary investigations revealed that the car would have been going at 140 km/h when it hit the victims.Within a few hours of the incident, Inspector Jagdish Pandey of the Police Control Room of Delhi Police traced the car by trailing the oil leak to the grade from the spot of the accident.They found the one-month-old car, purchased in his sister Sonali Nanda's name, with foreign number plates, which had not been registered in India.