CHY 183 Lecture Notes - Lecture 3: Jigsaw Puzzle, Buccal Swab, Nylon
22 Oct 2017
School
Department
Course
Professor
Document Summary
Physical evidence: encompasses any and all objects that can establish that a crime has or has not been committed, or can provide a link between a crime and its perpetrator. If the investigator cannot recognize physical evidence or cannot properly preserve it for lab examination, no amount of sophisticated lab instrumentation or technical expertise can salvage the situation. It is difficult to ascertain the weight a given piece of evidence will have in a case as ultimately the weight will be by a jury. Purpose of examining physical evidence: the examination of physical evidence by a forensic scientist is usually undertaken of identification or comparison purposes. Common types of identification: the crime lab is frequently requested to identify the chemical composition of an illicit drug. Aayushi nema is a two-step procedure: combinations of select properties are chosen from the suspect and standard. Need to have samples to multiple alphabets and numbers there is no set number.
