The technology could allow investigators to pick up DNA identities from plastic cards and even build up a complete history of the people who have handled a paper document.
"You'd have to wear a space suit to stop yourself from leaving traces. You can identify cells on the paper, so you can work out where it's come from and who's touched it,” he said.
The technique could also be used to trace the thrower of a punch(打孔)from cells left behind on the skin of their victim. Even the wearing of latex(橡胶)gloves would not help: small cells can pass through the gloves, and the constant flow of genetic material given off by the human body would leave further evidence.
"We gained a skin cell from a document dating back 30 years and managed to gain a DNA fingerprint. DNA evidence can remain fresh for decades, perhaps even centuries," Dr Findlay said.
"The potential for this technology to solve unsolved crimes is great, "he said.
But Dr Findlay, named scientist of the year in 1998 by the European Society of Human Genetics, said the new testing needed to be scientifically validated, which would take up to five years.
He said, "There are serious consequences taking on technologies too early. The public has to be sure that they have the utmost confidence in the security and court systems."
51. The main advantage of the new technology is that ______.
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