Policing DNA

In A Sinister Side to Sequencing we noted that, wondrous though the advances in sequencing DNA have been, every silver lining …, so to speak. This was in the context of our now being able to determine whether babies will be born with genetic defects, raising the prospect that parents may opt not to have afflicted children. Because we feel that the avoidance of politics has such beneficial effects on the tone of these pieces, we did not mention another problem raised by the ready availability and sophistication of current DNA analysis methods, namely use of the data by police forces, specifically by the procedure usually called DNA fingerprinting. But, needs must …

First of all, what’s DNA fingerprinting?

DNA profiling (or fingerprinting) methods, pioneered by Sir Alec Jeffreys at the University of Leicester, have undergone substantial refinement since they were first used as a police forensic test in 1986 to identify the rapist and killer of two teenagers. Regardless of detail, the essential point is that that the genetic code of individuals is compared using DNA that can be extracted from most tissues or body fluids (e.g., blood, semen, cheek cells, etc.). From the samples to be compared short lengths of DNA are generated and separated by size in a gel, stained so that the DNA fragments show up as bands. Each of us has a unique pattern. In the picture the pattern from suspect 2 is identical to that of DNA taken from the crime scene – so he dunnit!

DNA patterns




Short lengths of DNA samples obtained from a crime scene and from the tissues of three suspects separated in a gel and stained to show as black bands





Why is it in the news?

The Supreme Court of the United States has just ruled that the police should be permitted to take DNA samples from an arrested individual, as Maryland officers had done from a character who’d been waving a shotgun only to find that he’d committed an unsolved rape case in 2003 from which they were still holding a DNA sample. An excellent result, you might think. Perhaps, but the ruling has nevertheless got the liberals up in arms, as represented by Antonin Scalia, an Associate Justice of the Supreme Court. Put briefly, his point is that DNA sampling is following the path of fingerprinting, things will go headlong downhill and before long we’ll have to submit to it if we want to get on a plane or play for a school sports team. This would clearly be an unacceptable invasion and so, inevitably, The Fourth Amendment to the United States Constitution is invoked – for outsiders that’s the thing purporting to protect citizens from ‘unreasonable’ actions by the powers that be, whatever that means to any administration that happens to be in charge.

No one sane is arguing that the police should not be permitted to use DNA in the pursuit of villains. The problem is how to keep the lid on Pandora’s box. So, without for a moment implying that the good denizens of the US of A might be a touch parochial, let’s take the drastic step of casting a glance beyond the limits of sea to shining sea.

In the rest of the world?

What better place to start than with the mother of modern democracy and what was the land of the free before the US of A was invented? Shock horror: it emerges that little old England has more DNA samples per head of population in the hands of its police than any other country for which information is available! How can this have come about? Well, the Police and Criminal Evidence Act of 1984 permitted the police to take fingerprints and body samples without consent from people charged with, or convicted of, a recordable offence (these include begging, being drunk and disorderly and taking part in an illegal demonstration – ‘illegal’ having been interpreted somewhat flexibly in recent times). However, those powers were extended in 2004 to permit samples being taken from anyone arrested on suspicion of any recordable offence. You will recall that this was during the Premiership of Mr. Blair, a chap with little interest in civil liberties and none at all in parliamentary democracy.

Back in 1949, when a parliamentary democracy seemed an immovable feature of British life, the United Kingdom (UK) became a founder member of something called The Council of Europe – designed to promote cooperation over matters relating to the law and human rights. Bear in mind that this is quite distinct from the European Union (EU) – the organization that lives in decadent style in Brussels to which the mother of parliaments has for some time ceded control of its affairs. EU members include Poland, Hungary and Estonia and it’s largely run by the Germans and the French. Funny how things turn out. Shock horror number 2 is that the UK is the only Council of Europe member that allows retention of biological samples from people who have been acquitted of charges or against whom criminal charges have been dropped. The Council of Europe has a sort of sub-body called The European Court of Human Rights before which was recently brought a UK case about whether the retention of DNA and fingerprints from innocent people is consistent with human rights law. In short, they don’t think it is and it’s worth quoting a key phrase in their conclusions: “… retention … constitutes a disproportionate interference with the applicants’ right to respect for private life and cannot be regarded as necessary in a democratic society.

So, what’s happened?

Well, for once let us rejoice in being interfered with by those pesky Europeans because, as of May 2012, the UK now has a Protection of Freedoms Act covering the operation of the UK Police National DNA Database. A critical feature is that DNA and fingerprint records of over a million innocent individuals will be deleted and the DNA samples destroyed. It should be added that seemingly Maryland law also requires destruction of DNA samples taken in cases that do not lead to conviction.

What will be done?

The problem with protecting freedoms is that laws are OK but someone needs to do the protecting. No one who has reviewed the activities of the British police that have come to public attention over the last twenty years would have any confidence either in their morality or their competence, never mind their inclination to police themselves. The fact that, according to GeneWatch UK, companies have been permitted to use the police DNA Database for research purposes without, of course, individual consent would confirm your doubts.

Re-crossing the Atlantic it would also seem sensible to ensure first that reasonable legal safeguards are in place across all states to control police activity  but after that to keep Mr. Scalia’s concerns in mind and remain vigilant in ensuring that those provisions are adhered to.

Finally, all that having been said and with due regard to the seriousness of this matter, one might observe that countries prone to promoting themselves as models of human rights that nevertheless pass laws permitting indefinite detention of citizens without trial and are not averse to the use of torture have somewhat weightier matters to resolve than what the fuzz do with a few cheek swabs.





National Defense Authorization Act, 2012.

2 comments on “Policing DNA

  1. Pingback: A Small Helping For Australia | Betrayed by Nature: The War on Cancer

  2. Pingback: A Taxing Inheritance | Betrayed by Nature: The War on Cancer

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