DNA - Do Not Accept
May 2000 |
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What's
it about?
It has become a truism in the law that when Justice Michael Kirby of the High Court
posits an opinion, he tends to make a lot of sense. Putting aside his expertise as a
jurist, his comments on various social issues associated with the law are based on common
sense and clear public policy imperatives. So it is no surprise to see His Honour launch
into a lucid dissection of a longstanding debate in the legal and law enforcement
communities, now very much in the public domain. Put plainly, should we move towards the
establishment of a national DNA database in order to assist the police in the search for
criminal offenders?
What is DNA?
Here's a mouthful - Deoxyribonucleic Acid - okay, we'll call it DNA. Think of it as a
genetic fingerprint, a unique identification marker that cannot be duplicated between any
two human beings, unless they happen to be identical twins. Make no mistake, it is not our
intention to cast doubt on the usefulness of the testing procedure as a criminal
investigative tool. In fact, DNA testing is probably the most sophisticated breakthrough
in forensic evaluation since the development of the fingerprint - better, in fact, because
it is a lot harder to avoid detection (you can't just slip on a latex glove). For
instance, a cigarette butt, a strand of hair or saliva on the neck of a bottle may provide
damning evidence.
How is it tested?
A genetic sample is taken from a crime scene and then matched
against a sample taken from a suspect. The two are compared and the results produced in a
graph that resembles the readout from an ECG, or perhaps more accurately a consumer
barcode. There are varying estimates about the accuracy of the test, but let's not
quibble, the error rate is well under one in a million. Given that the burden of proof in
a criminal case is "beyond reasonable doubt", those odds are well within an
acceptable range. As was recently seen in an Australian town (see below) the sample is
usually taken by way of a swab from inside the cheek. From that point there are a lot of
similarities to the procedure undertaken in athletic drug testing. Clearly the sample has
to be kept in a physical environment that ensures it will remain intact, and more
importantly, tamper proof.
What happened in
Wee Waa?
Apart from Wales, is there any country on Earth that manages to produce such
wonderfully peculiar names for its towns? No, Wee Waa is not an occult incantation, it is
a small cotton-growing town in the north-west of New South Wales. Last month a 44 year old
farm labourer was marched into the Local Court and charged with the alleged attack and
sexual assault of Rita Knight, a 91 year old resident of the town. Apart from the terrible
nature of the alleged crime, it was the preceding forensic investigation that made the
headlines.
Five hundred men, almost the entire male population of the
town, had been swabbed by police to obtain a voluntary DNA test. As most of us saw on the
television reports, the decision by police to undertake the tests was greeted with almost
universal enthusiasm by the townsfolk. This is understandable. The victim is a member of a
small community, and given the awful allegations, it was always on the cards that the
locals would agree to undertake an unobtrusive test in an attempt to nab the offender. We
take no issue with this attitude. Victims of crimes, or their relatives or friends, are
fully entitled to expect convictions of those who prey on them and promote the means to do
so. In a democracy it is up to the politicians to take the long view.
Let's argue the toss
Justice Kirby makes a salient point - law enforcement should not
intrude on a person's life without reasonable cause. Sure, if you are caught near the
scene of a crime and you do not have sufficient reason to be there, and the physical
evidence is concurrent with a supposition of some involvement, it would be
"reasonable" to seek forensic evidence to confirm or allay those suspicions.
That doesn't mean a person should be compelled to take a test, but it is fair to seek an
order of a judge to do so.
But as Justice Kirby recently asked, in relation to the question of
mass DNA testing of the population, "How are we going to ensure the democratic checks
and maintain the controls of the sort of society we have when the technology and the
science rushes ahead and beyond the capacity even of informed, conscientious and
intelligent people to keep pace?"
Of course His Honour is not without informed and conscientious
opponents in this view. As Alistair Ross, the Director of the National Institute of
Forensic Science countered, "DNA testing is an intelligent tool provided safeguards
are in place." To be fair, Mr Ross does not appear to support enforced mass testing.
But as many talkback callers have recently suggested, it would surely be simple enough to
take DNA samples from the population to establish a national database, or as happened in
Wee Waa, from a representative group in the vicinity of a crime, to establish a
streamlined method of crime detection.
Our Verdict
There is nothing wrong in a forensic driven criminal investigation
culture. That is good science and merely the result of technological advances. But let's
be careful of politicians who suggest we should arm ourselves with a national DNA
database, because as we all know, there are votes in law and order. It is one thing to
match a DNA sample of a previously convicted criminal with a later crime, but what of
samples taken from suspects eventually cleared of suspicion? Does the value of DNA testing
mean that entire towns should be tested? In Wee Waa the testing was achieved on a
voluntary basis, but can you imagine the peer pressure that would come to bear in a
close-knit community suffering the aftermath of a terrible crime?
Our legal system is based on the concept, understood by anyone who
has watched even the most fictional television crime show, that a person is innocent until
proven guilty. That doesn't mean a person has to prove their innocence, quite the
opposite. Lest we believe this is merely a technicality, or a bit of legalistic
tap-dancing, it might be well to remember that our citizens have fought wars and laid down
their lives to protect these basic freedoms. When the police come knocking at the door,
let's not be quaking in our boots because we can't prove our innocence. Where will it stop
- at one town, one city, our whole country? These are the basic issues that set us apart
from societies that control their citizenry though fear and assaults on their privacy.
What do you think?
Read this: The legal information contained above is
intended to be general information about the law. It is not a substitute for legal and
other professional advice. Lawscape Communications P/L does not accept responsibility for
loss to any person, who either acts or does not act because of this information.
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