Documents and Forgery Ms文件和forgery质谱. Drurys Flipped .pptx

Questioned Documents Unit Questioned Documents: Any document about which some issue has been raised or that is the subject of an investigation. Objectives: Determine the origin of a writing sample using the 12 exemplars Examples of Questioned Documents Checks Licenses and Certificates Passports (Counterfeit) Money Receipts Lottery tickets Historical documents Ransom and suicide notes Forgeries of Art 3 Objectives: Determine the origin of a writing sample using the 12 exemplars Document Examiners: Mostly examine handwriting to originate its source or its authenticity Will also examine typed writings, computer printings, photocopies, inks, papers, and forgeries, and decode altered and charred documents May need to use microscopes, photographs, chromatography, and other lab examinations on the questioned documents Many work in federal, local, and state crime labs, but they may also work in private practices Objectives: Determine the origin of a writing sample using the 12 exemplars Handwriting: Two individuals cannot have exactly identical handwriting Since handwriting is associated with mechanical, physical, and mental functions, it is almost impossible to reproduce exactly Handwriting can be almost as individual as a person’s fingerprint Objectives: Determine the origin of a writing sample using the 12 exemplars A positive comparison must be based on an ample number of common characteristics between known and questioned writings Collecting a lot of exemplars (known writings) is critical in order to make a comparison Exemplars should contain some of the same words or combinations of letters that are present in the questioned document(s) Objectives: Determine the origin of a writing sample using the 12 exemplars Two writings came from one person if: their similarities are unique and no unexplainable difference(s) are found Examine the questionable document for detectable traits and record them Obtain a known sample of the suspect’s writing (an exemplar) Compa