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Forensic Training 101 Kiyosha N. Malcolm C. Kevin M. Imani W.
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What's the Scope ? What's Forensic Science ? Forensic Science : is the application of science to law. Forensic Science is also the application of science to those criminal and civil laws that are enforced by police agencies in a criminal justice system.
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Major Labs Crime Laboratory : First laboratory was LAPD Federal Laboratory: 1. FBI : belongs to the department of justice(DOJ) - broad investigative Power 2. DEA: belongs to the department of justice (DOJ) -Analysis of drugs & all related items 3. ATF : Belongs to department of Treasury. -Alcoholic beverages, weapons, explosive device, gun control, & organized crime. 4. US Postal Inspection Service: Part of USPS - Criminal investigations related to the postal service.
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Admissibility of Evidence Admissibility of Evidence - The rejection of the scientific validity of the Lie Detector ( Polygraph ) established a standard guideline for determining the judicial admissibility of scientific examination.
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Frey v. United States - The courts ruled that in order to be admitted as evidence at trail, the questioned procedure, technique, or principles must be " Generally Accepted" by meaningful segment of the relevant scientific community. - Usually requires collection of expert to testify or books/papers written on the subject.
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Daubert v. Merrel - In 1993, the U.S. Supreme Court asserted that "General Accepance" is not an absolute prerequisite to the admissibility of scientific evidence.
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Crime Scene Procedures - Secure & Record Secure & Isolate the crime scene - the responsibility of the first responding officers. - Priority is medical assistance to any individuals in need & arrest of any perpetrator. Record The Scene Step 1: Take A Photography - The Scene should be unaltered -Objects that have been moved it taken MUST NOT be REPLACED !!!! -Object should be photograph showing their position & location relative to the entire scene - Video taping can augment but does NOT replace still photographs.
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Rough Sketch & Final Sketch Rough Sketch : - Is a sketch drawn at the crime scene that contains an accurate depiction of the dimension of the scene & shows the location of all objects having a bearing on the scene. - Usually not drawn to Scale Final Sketch : - A precise referring of the crime scene. - Drawn to scale !
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Dealing With Physical Evidence - there are specific procedures for finding, collecting, & transporting physical evidence. A. Conduct a systematic search for evidence: - How a crime scene is searched is dependent on the locale & size of the area as well as the actions of suspect & victims at the scene. B. Collecting Physical Evidence - Can be anything from very tiny to very LARGE.
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Collection, Storage, & Chain of Custody Collecting Physical Evidence - clothing from all persons present at a crime scene may be necessary. - critical area should be vacuumed & the sweepings submitted to the laboratory for examination. * Packing Evidence separately prevents damage through contacts & prevent cross contamination.
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