DNA is the most powerful tool available for identification in forensic investigations. Because of its ability to link physical evidence found at a crime scene to a single person, it is often referred to as a “digital fingerprint.” This method is so precise that it can ensure pinpoint accuracy, down to one in a billion. And, unlike fingerprints, which can only be found if a suspect touches something, DNA exists in every cell of the human body, from hair and blood to skin and tears, and can be shed or deposited while committing a crime. That means it is often the only means for accurate identification.
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