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Fears raised about accuracy of new forensic DNA techniques


Genetic science has progressed significantly in recent years, and it influences how crime is being investigated in the US and elsewhere.

DNA analysis started being used to identify crime suspects about 30 years ago, with the first conviction thanks to DNA evidence happening in 1986.

It’s easy to assume from watching TV crime drama series that DNA evidence is irrefutable, because that’s how it’s portrayed in fictional criminal courts. The Guardian interviewed Professor Shari Forbes of the Centre for Forensic Science at the University of Technology, Sydney about this matter:

The problem we find is that juries increasingly expect DNA to be collected from every single crime scene, and when it’s not, either because it can’t be found or it wasn’t required, we end up spending a lot time explaining why.

Forbes also mentioned that people in the general public who become jury members will often assume that if no DNA was found in a crime scene, that means the perpetrator wasn’t...(continued)

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