Katie Worth tells us “how a proven tool may be anything but,” in reference to DNA testing, for Frontline:
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…Peter Gill is a giant in the forensic DNA community, counted among the scientists who wrote the original paper conceptualizing DNA as a forensic tool in 1985. But he has spent recent years warning people using his tool against blindly trusting its results. In a 2014 book called “Misleading DNA Evidence: Reasons for Miscarriages of Justice,” Gill wrote that contamination is dangerous because investigators are eager to believe that DNA found at a crime scene must come from the perpetrator.
“The presence of a DNA profile says nothing about the time frame or the circumstances under which it came to be there,” says defense expert and researcher Dan Krane. “Test results can’t distinguish between the possibility of contamination, or evidence tampering, or, you know, murder.”
Technology may soon increase the danger of implicating innocent people.