Why DNA is not Foolproof

DNA Evidence To be fair, DNA evidence would go down in history as one the most influential technologies by the criminal justice system. However, its much-touted “infallibility” is falling like a pack of cards in the face of growing technological scrutiny. DNA Evidence is Fallible For the layman, the premise of using DNA evidence is fail-safe. Our DNA is one of a limited number of biological signatures—another being our fingerprints. Considering that on average we shed 30,000 and 40,000 skin cells per hour, it is overwhelmingly possible for a suspect to leave a bio-trail at the scene of a crime that makes identifying him or her remarkably easy. However, that explanation is also the bedrock of the opposing viewpoint held by professionals—that DNA evidence is easily transferable. Especially in instances where the DNA evidence is culled from skin cells, then the ability of skin cells to move easily can be a limiting factor to the reliability of the technique. Take this illuminating scenario for example. The murder of a multimillionaire was pinned on a homeless man. Unfortunately, this was a false allegation. The paramedics that… Read More