The Jaguar that rammed into a Mercedes and killed two Bangladeshis was travelling at 135kmph and the speed came down to 69kmph in 10 seconds when it crashed, an analysis of the car’s event data recorder (EDR) has revealed.

The findings suggest Raghib Parwez, who was allegedly at the wheel of the Jaguar F-PACE, had tried to slow down the car 10 seconds before the crash, police officers familiar with the probe said.

Raghib, 25, a scion of the family that runs the biryani chain Arsalan, was arrested on August 21.

“The accused had either seen the Mercedes or some other vehicle from a distance or was trying to slow down to negotiate the Theatre Road-Loudon Street crossing. However, the collision that resulted in the death of two Bangladeshi bystanders could not be averted,” said an officer.

Calcutta police have received the “analysis report” of the Jaguar’s EDR from the company’s headquarters in the UK.

The report, officers said, states that the car was travelling at 135kmph 10 seconds before the crash. Then the brake was pressed and the speed came down to 103kmph in five seconds. The car was moving at 69kmph when it rammed into the Mercedes.

“The speciality of the Jaguar EDR is that it does not capture the average speed of the car. Rather, it takes note of anything sudden or abrupt during the ride. The EDR (of the car Raghib was allegedly driving) recorded that there was a sudden drop in speed from 135 to 103kmph in five seconds. Finally, when the Jaguar hit the Mercedes, the speed had come down to 69kmph,” said joint commissioner (crime) Murlidhar Sharma.

The two occupants of the Mercedes — Amit Kajaria and his wife Kanika — suffered multiple injuries. Amit had told the police that he was driving at a “normal speed”.

An officer of the traffic department’s fatal squad said that had the Jaguar hit the Mercedes at 135kmph, the damage would have been “unimaginable”.

Raghib has apparently told the police that he was driving at such a high speed because the entire stretch was empty. “Suddenly, he spotted the Mercedes from a distance and pressed the brake hard. But it was not enough to avert the collision,” the officer said.

The police had initially arrested Raghib’s younger brother Arsalan. But an analysis of the Jaguar’s EDR led them to Raghib.