Lecture Notes for Feb 21, 2010

Testimonial evidence ? Testimonial evidence statmentsof victims and witnesses ? honest: solid or poor conditions ? Dishonest: perjury ? Dierect physical evidence- indisputable connection ? Circumstatantial evidence- link to multiple scenarios ? Physical Evidence ? weapons ? blood / fluids ? imprints and impressions ? traces of person vehicle ? marks of tools ? used to gain access to locked premises or containers ? Dust, dirt, fibers and other traces ? questioned documents ? miscellaneous trance or transfer evidence ? How much to collect? ? everything- collect items - crucial evidence too little ? return visits may not be possible - site maybe contaminated ? The signigicance of physical evidence ? Identification ? Comparison ? Individual characterstics ? class characteristics ? Product rule ? Values of Data ? compared questioned item to library ? examples ? IAFS ? CODIS ? NIBIN ? PDQ ? SICAR ? Criteria for determining Evidentiary Vales ? uniquesness- general characteristics not enough need as specific ? inconsistency- object at scene not belong anomalous behavior of suspects ? Crucial legal issues in criminal Procedures ? 4th amendment ? No reasonable search and seizure ? warrents clause ? 5th amendement ? privilege against self -incrimination ? 6th amendemtn ? Right of confrontation (accuser is identified ? right to council ? miranda warning ? supreme court Decisions ? Frye v U.S. ? Daubert v. merrell Dow ? Iumho tire V. Car Michael ? Coppolina v. state ? Use Fibers - Textile ? much fibers made into textile then into other products ? source of most fibers in forensic lab ? two major methods of construction ? Weaves ? Knits ? Textiles ? collect entire itme may cut out individual peices late ? Fibers ? Collect 1" mass insulation ? collect 1 yard rope/ twine ? best collect all ? tape lift