It's a trope of prime-time detective shows: a man is about to be convicted of a brutal murder when the detectives find the weapon, complete with traces of DNA. They send the DNA for analysis and in just a few TV minutes, they have their answer. The man is innocent. Case closed. Unfortunately, this level of scientific certainty is just as fictional as the show's plot. DNA is hardly the airtight evidence most people think it is.
It All Started So Well
10 Scientists, 10 Different Answers
Why We Can't Always Trust DNA Evidence
Written by Ashley Hamer February 16, 2017
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