Dr Palmer is now discussing the 22 fibres found in Jane's hair, being mostly grey polyester fibres alleged to match the seat insert from Mr Edwards' former work car.

He said he believed the recovery of those fibres was to be expected if Jane had been in contact with a 1996 Holden Commodore VS Series vehicle.

Of the one blue polyester fibre recovered, he said the fibre was "likely to be remnants of those originally transferred to her".

"It's astonishing to think that only one blue polyester was transferred and only one had been recovered at the end," he said.

The fibre is alleged to have come from Mr Edwards' Telstra trousers.

Ms Barbagallo is now asking about the 61 fibres recovered from Ciara and asking why only two out of the three fibres from the Telstra trousers' fabric were recovered.

Dr Palmer said the shedability tests done on the trousers - which showed the fibre which wasn't found shed the most - were not significant as it was like comparing "apples with oranges" due to the unknown factors in this case, and the unknown persistance of the trouser fibres over time.

He said given the fibre combination of carpet fibres found in the 27-year-old's hair, he expected she would have been in a vehicle matching those fibres.

He also said he believed the evidence suggested Ciara's hair made direct contact with the main cabin carpet area within the vehicle.

He was unable to say whether the one car carpet fibre found in Jane's hair indicated if she had had direct contact with the rear boot floor or whether it was a secondary transfer.