The police on Tuesday submitted a report of a Delhi-based institute before the court that supports their allegation that tyres of the truck, which was used to overrun Jyoti to kill her, were burnt to destroy evidence.
As per the police charge sheet, on February 1, 2013, in his confession before the police, Paramjit alias Pumma said that he burnt the rear tyres of the truck which was used to overrun Jyoti at Chaudhary's crusher in Baddi.
The ashes were recovered from the spot and were sent to Forensic Science Laboratory (FSL), Madhuban, Karnal, which, however, could not give any conclusive results.
The police then sent the sample to a Delhi-based institute, Shriram Institute for Industrial Research. The sample which was provided to the institute was in the form of semi-burnt rubber crumbs.
The report from the institute, dated January 31, 2014, says, "Based on the observation of the studies such as IR (Infra Red), ash analysis, burning behaviour, thermo gravimetric analysis and chemical analysis, the nature of material is identified to be a part of semi-burnt heavy motor vehicle rubber tyre."
"Our case is that after partially strangulating Jyoti, the accused put her before rear tyres of the truck. Then she was overrun. The rear tyres could have blood stains. They burnt the tyres to destroy evidence," said deputy commissioner of police Ashwin Shenvi.
Had the report did not come that the burnt tyres belonged to a heavy vehicle, the defence would have taken the argument that it was a wrong recovery and Jyoti was not overrun by a truck.
Jyoti, 24, was found dead, her head smashed, by the side of the road at Sector 21 in Panchkula, on November 22, 2012.