Officers said they were awaiting a report from forensic experts and a chargesheet will be filed in the case at the earliest.
Prima facie, police have denied foul play in the incident and are now making their case on the basis of skid marks of the Tata Indica driven by Singh.
There are three skid marks on Aurobindo Marg towards Tughlaq Road. Singh had reportedly told police that it was Mundes driver who had jumped the red light and that he had to apply brakes thrice before the car came to a halt nearly 31 feet after he first applied the brakes.
Mundes driver had contradicted Singhs version and said it was Singh who had jumped the light.
Meanwhile, Mundes autopsy findings have shown that he died of internal injuries and haemorrhage.
The three-member panel, headed by head of AIIMS forensic medicine Dr Sudhir Gupta, had found that Mundes C1-C2 junctions of the spine had dislocated in the impact of the crash, which cut off oxygen supply to the brain and spine within moments of the injury.
It appears that Munde had hit the front seat of the car and that jerk led to a horizontal dislocation of two critical vertebrae and caused multiple fractures on his spine. He must have been conscious momentarily after that, but the oxygen supply to the brain must have snapped soon after. Once the brain stops functioning, this led to respiratory and cardiac arrest,a senior doctor said.
Mundes liver was ruptured in four points and there were injuries on his chest and stomach. Doctors said an abrasion on his nose still appeared to be the only external injury from the impact.
The internal injuries, mainly from the liver ruptures, had led to severe bleeding. About 500-600ml of blood was retrieved from the abdomen during the autopsy,a senior doctor said.
Doctors confirmed that no visceral samples had been preserved after the post-mortem examination.Though there are injuries to the chest and stomach and a massive liver rupture, the C1-C2 dislocation appeared to be the most grievous injury, he said.