Handbook of Forensic Services (pdf) - FBI

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ß ß ß ß Handbook of Forens c Serv ces 2007 White adhesive: can be used on smooth, nonporous surfaces. Used to l ft wet or dry mpress ons that have been chem cally enhanced or developed with dark fingerprint powder. Transparent adhesive: can be used on smooth, nonporous surfaces. Used to l ft wet or dry mpress ons that have been treated w th black or fluorescent fingerprint powder. Do not use on an or g nal mpress on. White gelatin: can be used on all porous and nonporous surfaces as long as the gelat n contrasts w th an mpress on. Used to l ft wet or dry mpress ons that have been chem cally enhanced or developed with fluorescent fingerprint powder. Black gelatin: can be used on all porous and nonporous surfaces. Used to l ft wet or dry mpress ons. Offers good contact w th most res due. Searching Shoe Print and Tire Tread Files A file of shoe manufacturers’ designs and a file of t re treads and other reference mater al can be searched to determ ne brand names and manufacturers. 130
Handbook of Forens c Serv ces 2007 Questions concerning shoe print and tire tread evidence should be directed to 703-632-7288, 703-632-7314, or 703-632-7315. Follow the ev dence subm ss on d rect ons, nclud ng Requesting Evidence Examinations and Packaging and Shipping Evidence. ß ß ß For shoe pr nt and t re tread compar sons, subm t or g nal ev dence whenever poss ble (shoes, t res, photograph c negat ves, casts, l fts). For shoe print and tire tread file searches, subm t qual ty photographs of the mpress ons. If photographs are not ava lable, subm t casts, l fts, or the or g nal ev dence. Deta led sketches or photocop es are acceptable. Images of mpress on ev dence may be subm tted electron cally. Call 703-632-7288 for specifics on submitting ev dence n th s manner. Unobtrus vely wr te the collector’s n t als, dates, and other relevant nformat on on the ev dence. ß A r-dry and package ev dence separately n Bubble Wrap; clean, smooth, h gh-qual ty paper or lam nated folders; or paper bags, depend ng on the tems be ng subm tted for exam nat on. Back to the top 131
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