Forensic and Investigative Science FIS 20500 Study Guide - Quiz Guide: Melvin Dummar, Lindbergh Kidnapping, Abrasive
25 Aug 2016
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Anything w/ linguistic or numerical markings (on any surface) that we aren"t sure if the doc is authentic or who the author is. Chromatography (tlc) is most popular and easiest methods of ink analysis. Inconsistent slant or letter formation, change of capitals, unnatural stops, lack of rhythm, using wrong hand. Request = asked to come into a controlled setting & give a writing sample. Non-request = something written in by an unknown person &/or an unknown location. Know what causes erasures, obliterations, charred, and indented writings and how they are detected. Obliteration: overwriting or printing w/ another instrument. can to dissolve or to use a light source that will transmit through obliteration. Chemical = dissolving or bleaching. abrasive cause a disturbance on the paper. Chemical can be detected by differences in the shade of paper or by behavior under. Charring: the pencil or ink may not burn as easy.
