Notes for Physical Evidence Power Point

Notes for Physical Evidence Power Point - Shoe prints...

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Notes for Physical Evidence Power Point The way evidence is interpreted determines its credibility. Evidence never lies. Edmond Locard’s Exchange Principal: Whenever two objects come into contact with one another, there is an exchange of materials between them. (Also invented 1 st crime lab) Drugs, explosives, fibers, firearms, glass, paint, petrol, plastic, and documents are common forms of evidence found at a crime scene. Impression evidence is any evidence left behind after something contacts a surface. Only use your tools at a crime scene, beware of booby traps. It is not uncommon for there to be blood born hazards at a crime scene. Evidence is given a unique ID number. The number dies with the evidence. Identification is the determination of physical or chemical identity with as near certainty as analytical technique permits.
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Unformatted text preview: Shoe prints become unique over time as the shoe is worn more. *Ted Bundy caught by the skin of his teeth. Friction ridged skin all around your fingers and on hand (prints that are taken should be wide). In over 100 years of research, no two fingerprints have been found to match. *Product rule is applied through random association. (multiply the probability of the events together and thats the overall probability of all events happening). *(KNOW FOR EXAM) Forensic Data Bases: IAFIS (integrated automated fingerprint id system), CODIS (combined DNA indexing system), NIBIN (national integrated ballistics information network), PDQ (paint data query), SICAR(shoe print image capture and retrieval) CODIS consists of NDIS (national), SDIS(state), and LDIS(local) DNA databases....
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This note was uploaded on 08/26/2011 for the course CHS 3501 taught by Professor Perr during the Spring '09 term at FIU.

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