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DNA Evidence: It's in Your Genes
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DNA evidence is also proving to be a powerful tool in determining the innocence of prisoners who were tried before DNA testing in its current form was an option. If bodily samples, such as blood or semen, were collected from the crime scene or victim and that evidence is still available for DNA testing, a showing that the prisoner's DNA doesn't match the crime-scene DNA can be a powerful reason to conclude that the prisoner is innocent and should be released. A number of prisoners who were sentenced to death have been cleared through this technology.
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