DNA could be faked by criminals, new study claims - Telegraph: "In experiments, a team of Israeli scientists were able to obliterate all traces of DNA from a blood sample and add someone else's genetic material in its place.
The process was so successful that it fooled forensic scientists who carry out DNA fingerprinting for American courts.
The findings threaten to undermine the key forensic technique, which has secured thousands of convictions in Britain and around the world."
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