Huntley had made a major attempt to sanitise his red Ford Fiesta car, thoroughly washing and vacuuming it, the day after the girls disappeared.
He ripped out the lining of the boot and replaced it with domestic carpet and he got rid of a throw that had been covering the back seat.
A mechanic in Ely testified that he had replaced all four of Huntley's tyres on Monday 5 August 2002, despite them having 4mm-5mm of tread left.
A forensic examination of the underside of the car found traces of chalk, brick dust and concrete.
This unusual combination matched the surface of the track where the girls' bodies were found. Pollen samples also linked the car to the site.