Should lie detector results be legalised in UK courts?

Lie detector results are currently not considered admissible evidence in UK courts. A lot of cases have been unsolved due to lack of evidence, despite perhaps having a main suspect of the crime; lie detector results can alter this. Since technology has developed recently, there is a lot of new information on polygraph testing, its efficacy and importance. The American Polygraph Association have stated that lie detectors are 80-90% effective which has also been recognised by the UK government, as noted on their website. However, there is controversy on how effective these tests can be in the matter of legal cases; if deemed ineffective, still utilising them may be considered a waste of time and resources. The question that stands is should lie detector results be legalised in the UK? On one hand, by polygraph testing being legalised, it may close many open cases and therefore bridge supposed gaps in our judicial system; there is over 200,000 outstanding cases in the UK and this number is only growing. On the other hand, the 10-20% chance of a polygraph as ineffective may mean innocent people may be convicted which would cause a fault in the legal system.

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