Handbook of Forensic Services (pdf) - FBI

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ß ß ß ß ß Handbook of Forens c Serv ces 2007 Do not mark or cut tems subm tted for comparison (e.g., clothing or firearms) where they are v s ble n the quest oned mages. Physical items such as clothing and firearms must be subm tted to the Laboratory for other exam nat ons such as trace ev dence, ballistic, or fingerprint analyses before they are subm tted for mage compar son. If photogrammetry s requested, nclude the d mens ons of the scene to the nearest e ghth of an nch and nclude a d agram or pr nt from the relevant mages nd cat ng the locat on of the measurements. Include one d agram or pr nt for every angle used n the scene. Do not touch or move the surve llance cameras. Subm ss ons for compar son w th the Ch ld Explo tat on and Obscen ty Reference F le must be l m ted to no more than 30 mages. Call 703-985-1393 for specific instructions. When subm tt ng such ev dence as a v deotape or data card, label the outer conta ner “FRAGILE, SENSITIVE ELECTRONIC EQUIPMENT” or “FRAGILE, SENSITIVE AUDIO/VIDEO MEDIA” and “KEEP AWAY FROM MAGNETS OR MAGNETIC FIELDS.” 78
ß Handbook of Forens c Serv ces 2007 Address the outer conta ner as follows: FORENSIC PROGRAM BUILDING 27958A ENGINEERING RESEARCH FACILITY FEDERAL BUREAU OF INVESTIGATION QUANTICO VA 22135 Back to the top Ink Examinations Exam n ng nked wr t ng n conjunct on w th other techn ques (e.g., handwr t ng analys s, watermark identification) can provide details regarding document preparat on. The compos t on of wr t ng nks var es w th the type of wr t ng nstrument (e.g., ballpo nt pen, founta n pen, porous-t p pen) and the date of the nk manufacture. In general, nks are composed of dyes n solvents and other mater als that mpart selected character st cs. Ink analys s usually s l m ted to compar sons of the organ c dye components. When nk formulat ons are the same, t s not poss ble to determ ne whether the nk or g nated from the same source to the exclus on of others. Exam nat ons cannot determ ne how long nk has been on a document. Questions concerning ink evidence should be directed to 703-632-8441. Follow the ev dence 79
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