Sucking up the clues

A vacuum cleaner that can sift forensically interesting material from soil at a crime scene has been developed at Michigan State University in East Lansing. The Trace Evidence Concentrator, built by Jay Siegel and Alvin Smucker, sucks up material and dumps it into a whirlpool created by water jets inside the device. Particles such as clothing fibres and hairs drift to the top,
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