Those forensic test results became a bone of contention between the UK and Portuguese police.
Detectives are waiting for forensic test results into the dead patients before deciding what further action to take.
The forensic test took place on November 5, three days after Kercher was found with her throat cut.
Newsnight conducted a forensic test into all 18 of the receipts which were given to us by our team of freelance Muslim researchers, and which we voluntarily passed to the programme, not just five, as implied by Seumas Milne.
Revelations of the efficacy of the forensic test in proving similar fabrications led to the disappearance from police storage in the West Midlands of dozens of potentially problematic notebooks.
He remembers how the Portuguese police leaked to their journalists that "forensic test results positively showed that linked her to the hire car, that her parents didn't hire till three or four weeks after she had disappeared".
Patel's attorneys also challenge the integrity of the "lung float test", the forensic test used by the prosecution to argue that Patel's infant was not stillborn when she delivered but alive.
In Cambodia, for example, the forensic test necessary to lay a rape charge costs two weeks' wages, while in Kenya a land claim in an inheritance case can cost $800 and extend across 17 different administrative stages.
