CHE113INTRO4 - principle or discovery the thing from which...

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CHE113 Forensic Science Nicolas Canel Forensic Science Introduction Scientific Evidence -“Trilogy” of Court Cases -Crime Labs -Areas of Expertise -Overview of Forensic Techniques Applied to Criminal Justice -Review of Matter and Selected Relevant Scientific Ideas Scientific Evidence in Court -Scientific (Forensic) evidence is aimed at informing the court where it lack expertise. -Assist in determining fact. -What is admissible evidence? –Real Science vs Pseudo (Quack) Science –Established how to determine the difference through 4 primary cases (Frye, Daubert, Joiner, and Kuhmo) Locard’s Exchange Principle -The most basic concept of Forensic Science: –Criminal in contact with an object or person, a cross transfer of evidence occurs –Examples; dust, biological samples, fingerprints, chemical residues, etc. Forensics in Court -Introduction - Frye Standard (1923, polygraph evidence) –“… the evidential force of the principle must be recognized, and while the courts will go a long way in admitting expert testimony deduced from well-recognized scientific
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Unformatted text preview: principle or discovery, the thing from which the deduction is made must be sufficiently established to have gained general acceptance in the particular field in which it belongs ”. –Sets up field as the “vaildator” for legal admissibility while court determines if principles are “generally accepted”.-Frye Standard (1923, polygraph evidence) –Technique must be accepted by a “meaningful segment of the relevant scientific community” through •Books •Papers •Prior judicial decisions •Length of existence of technique-Problems with Frye: –Inflexible (and slow) for new developments or extensions of existing techniques and methods. –Requires complete agreement in the scientific world. Advances in FS since Frye-Field has changed – now represents a true applied science (not always the case).-Changes have been most dramatic in the past 20 years….why?-What is the least reliable form of FS evidence.-Led to Daubert (later)...
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This note was uploaded on 03/02/2012 for the course CHE 113 taught by Professor Spencer during the Spring '08 term at Syracuse.

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CHE113INTRO4 - principle or discovery the thing from which...

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