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FOR KIDS: A clean getaway

New household cleaners may make blood hard to find at crime scenes

Criminal investigations begin with a search for clues. Teams of investigators arrive at a crime scene armed with special fact-finding gear. They look for standard evidence like fingerprints, footprints or blood at the scene of a crime.

But scientists recently discovered something troubling. Some new household cleansers can remove all traces of blood. If criminals simply use these products to clean up after themselves, police may have a hard time gathering evidence.

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