LawNews - Issue 35

Page 1

THIS WEEK’S ARTICLES

Issue 35 9 Oct 2020

How expert witnesses can make or break a trial p1

Pessimism about new Trusts Act misplaced p3

Why our digital harm legislation isn’t working pages 6 & 7

LawNews adls.org.nz

CRIMINAL LAW

How expert witnesses can make or break trials By Rod Vaughan

MediaNews Group/Boulder Daily Camera via Getty Images

How should one view expert witnesses? Hired guns, out to make a financial killing? Or fastidious forensic scientists, totally committed to establishing guilt or innocence without fear or favour? With the increased reliance on the testimony of experts in legal proceedings, not just in New Zealand but globally, the question is often asked. Their pivotal role in criminal and civil actions can make or break a case, often with groundbreaking ramifications. In New Zealand, think David Bain, Mark Lundy, Teina Pora, Ewen Macdonald and George Gwaze, to name but a few high-profile criminal cases involving complex scientific and medical argument. Forensics of a different kind have also played a major role in determining the outcome of a multitude of civil cases such as corporate fraud or negligence. The leaky homes saga, for one, has drawn heavily on experts in many fields. To address the issues thrown up by the proliferation of expert witnesses, many of whom may give conflicting evidence during trial, LawNews sought the views of some of the key players involved in their selection, training and use. In the first of a two-part series, we quiz lawyer Nikki Pender who established Legal Empowerment, an Australasian company that trains expert witnesses, and forensic science consultants Dr Anna Sandiford and Paige McElhinney of The Forensic Group. How widespread is the use of expert witnesses in criminal and civil cases in New Zealand and has there been a significant increase in their numbers in recent years? Anna Sandiford/Paige McElhinney There has been an increase in the criminal arena. It may now be easier to find an expert. We have more than 200 in our database and can find an expert to help with almost any inquiry.

Expert witnesses must be sufficiently independent that judges and juries can trust their opinions

If experts are not from New Zealand, I warn them that, certainly compared to the UK, the New Zealand cross-examination process is much more, shall we say, robust It may also be because barristers are discovering how helpful an expert can be in not only assisting in their understanding of the science but also in asking the right questions. Many more resources and scientists are now employed in DNA than previously. Unfortunately, that means there has been a reduction in some other areas of expertise and we are losing valuable

knowledge as people retire. What are some of the most high-profile criminal and civil cases where expert witnesses have played a pivotal role? Nikki Pender If you want a dramatic historical example of how pivotal witness performance can be, I would recommend episode seven of the podcast A Perfect Storm. The podcast itself is about the death of Azaria Chamberlain and the miscarriage of justice suffered by her parents, Lindy and Michael. Episode seven covers the criminal trial, with an emphasis on the performance of the expert witnesses. Read more. Joy Kuhl, a forensic biologist called by the prosecution, claimed that samples taken from the Chamberlains’ car tested positive for foetal blood. Her evidence was pivotal as it allowed for the theory that Lindy Chamberlain had slit the baby’s Continued on page 2


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