The reputation of DNA testing remains mostly untainted, rose-tinted by the mental imagery of white-coated techs working in spotless labs to deliver justice, surrounded by all sorts of science stuff and high-powered computers. In reality, testing methods vary greatly from crime lab to crime lab, as do the standards for declaring a match. People lose their freedom thanks to inexact science and careless handling of samples. And it happens far more frequently than anyone involved in crime lab testing would like you to believe.

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