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Dynamic Duo Streamlines Evidence Detection

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Ruth A. Mendonsa

Any "whodunit" fan is familiar with the scene where the sleuth uncovers a vital clue from a pad of paper by rubbing it with a lead pencil to bring out the impressions of handwriting from the previous page. If only it were always that simple. Although this method of detection is still in use, today the suspect document is processed with an electrostatic detection apparatus that uses photocopier toner to develop the areas of indentation after a document has been covered with an electrically charged plastic film. In the best of cases, when the document is processed with the electrostatic device...Read full article

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