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Expert Witness: Fibre Trails and Diamonds (S1EP4 BBC One Thurs 28 Oct 2021)

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Fibre Trails and Diamonds: With so many forensic techniques available, detectives and expert witnesses can sometimes disagree on how best to search for evidence. In 2006, a team investigating three notorious cold cases in Pembrokeshire were convinced DNA analyses would hold the answers. But when that drew a blank, they had to rethink their approach entirely. What followed was the forensic equivalent of a trail of breadcrumbs that eventually led to the killer.

Expert witnesses help solve all types of crime, not just violent ones. Our next case is an unusual case of fraud. It involved diamonds and expensive wine, and cost some victims their entire life savings. The fraudster might have got away with it, but an expert witness with a very unusual specialism was finally able to reveal the evidence that secured a prosecution. We go to a diamond lab in Birmingham to investigate how gemstone expert Richard Taylor uncovered the fatal flaw in this devastating diamond investment scam.

Airdate: Thurs 28 Oct 2021 at 10:45 on BBC One

Season 1 Episode 4

Expert Witness explores the inside stories of how expert witnesses helped solve some of the UK’s most complex major crime cases, using forensic science to reveal the hidden clues criminals leave behind. Each episode features two different cases, and hears from those involved in solving them.