Handbook of Forensic Services (pdf) - FBI

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Handbook of Forens c Serv ces 2007 Rubber Stamps A rubber-stamp mpress on can be compared w th a known source. Subm t the rubber stamp to the Laboratory uncleaned. Plastic Bags Plast c bags (e.g., sandw ch and garbage bags) can be compared w th a roll or box of bags. Anonymous Letter File The Anonymous Letter F le conta ns mages of anonymous and/or threaten ng commun cat ons subm tted to the Quest oned Documents Un t for examination. This file can be searched in an attempt to assoc ate text from a commun cat on n one case w th text from commun cat ons n other cases. Bank Robbery Note File The Bank Robbery Note F le conta ns mages of notes used in bank robberies. This file can be searched n an attempt to assoc ate text from one bank robbery note w th text from bank robbery notes n other cases. Questions concerning documentary evidence should be directed to 703-632-8444. Follow the ev dence subm ss on d rect ons, nclud ng Requesting Evidence Examinations and Packaging and Shipping Evidence. 116
ß ß Handbook of Forens c Serv ces 2007 Documentary ev dence must be preserved n the cond t on n wh ch t was found. It must not be unnecessar ly folded, torn, marked, so led, stamped, or wr tten on or handled excess vely. Protect the ev dence from nadvertent ndented wr t ng. Mark documents unobtrus vely by wr t ng the collector’s n t als, date, and other nformat on n penc l. Whenever poss ble, subm t the or g nal ev dence to the Laboratory. The lack of deta l in photocopies makes examinations difficult and often w ll result n nconclus ve op n ons. Copies are sufficient for reference-file searches. ß Do not store or sh p photocop es n plast c envelopes. Back to the top Rope and Cordage Examinations A p ece of rope or cord can be compared w th a quest oned rope or cord. The compos t on, construct on, color, and d ameter can be determ ned. If a tracer s present, the manufacturer can be determ ned. Questions concerning rope and cordage evidence should be directed to 703-632-8449. Follow the ev dence subm ss on d rect ons, 117
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Handbook of Forensic Services (pdf) - FBI

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