Handbook of Forensic Services (pdf) - FBI

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ß ß ß Handbook of Forens c Serv ces 2007 Record on each exemplar the date the exemplars were obta ned, the name of the person who prepared the exemplars, and the cond t ons under wh ch the exemplars were made. Record the make, model, and ser al number of the photocop er; nformat on about the toner suppl es and components; whether the paper supply s sheet- or roll-fed; and opt ons such as color, reduct on, enlargement, zoom, mask, tr m, and ed tor board. Do not store or sh p photocop es n plast c envelopes. Graphic Arts (Commercial and Office Printing) Pr nted documents can be assoc ated w th a common source or identified with known commerc al pr nt ng paraphernal a such as artwork, negatives, and plates or office printing dev ces such as nk-jet or laser pr nters. Paper Torn edges can be compared. The paper manufacturer can be determ ned f a watermark s present. Paper can be exam ned for ndented wr t ng. Do not rub the ndentat ons w th a penc l. Do not add ndentat ons by wr t ng on top of the ev dence. 114
Handbook of Forens c Serv ces 2007 Burned or Charred Paper Burned or charred documents (not completely reduced to ash) may be dec phered and stab l zed. The document must be handled m n mally. The document must be sh pped n the conta ner n which it was burned, in polyester film encapsulat on, or between layers of cotton n a r g d conta ner. Age of a Document The earl est date a document could have been prepared may be determ ned by exam n ng var ous phys cal character st cs, nclud ng watermarks, ndented wr t ng, pr nt ng, typewr t ng, and nks. Carbon Paper or Carbon-Film Ribbon Used carbon paper or a carbon-film ribbon can be exam ned to d sclose the content of the text. Checkwriters A checkwr ter mpress on can be compared w th a known source. Exam n ng checkwr ter mpress ons may determ ne the brand or model of the checkwr ter. Embossings and Seals An embossed or seal mpress on can be compared w th a known source. Subm t the dev ce to the Laboratory. 115
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Handbook of Forensic Services (pdf) - FBI

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