Evidence Beneath Your Feet--from Law Enforcement Technology at Officer.com, April 14, 2006
....In 1965 three identification experts with the Metropolitan Police Department of Japan developed a new method to detect and collect dust impressions at crime scenes. They rubbed the surface of a black celluloid sheet with a woolen cloth to generate static electricity. They then placed the celluloid over a dust impression on the floor and rubbed it again with the same woolen cloth. The static electricity caused the dust impression to cling to the celluloid sheet, lift off of the floor, and appear distinctly on the sheet, writes William Bodziak in "Footwear Impression Evidence." Since this innovation, electrostatic dust lifters have evolved into powerful yet simple tools used to search for, detect and collect impressions in dust at crime scenes....more...
[INDENT]----At least the Keystone Cops have truth in advertising with their turtle logo on their traffic safety page.
The last time the Kanazawa Keisatsu aka the Keystone Cops were out at my house to investigate a burglary (one of 3 or 4 burglaries in 15 yrs) , I snickered at them spending a half hour with odd LED flashlights staring at my lino floors. It seemed like that was their only interest in investigation---now I learn that's its a Japanese tech that's slowly filtered to theWest. [/INDENT]