FSC239Y5 Lecture Notes - Lecture 5: Sole Markings, Abo Blood Group System, The Technique
Document Summary
Evidence: anything that can be used to probe an assertion, such as testimony (can be expert or otherwise), objects, or observations. Evidence is used to tie suspects to scenes and victims (linkages, context, etc. Physical evidence: any and all objects that can establish that a crime has been committed or link crime-victim, crime-perpetrator, perpetrator-victim. To be used effectively, its presence must first be recognized at the scene. Recognition identification individualization reconstruction. The more physical evidence recovered, the more likely a theory of what happened can be established. Everything cannot be collected, thus investigators must be selective based on knowledge of lab techniques, capabilities, and limitations. Lacking this knowledge can lead to evidence being overlooked, collected improperly, or overly collected (unnecessarily). Evidence must be collected usefully and not redundantly, as in only the items that are likely to have been involved are collected. Different labs then have different requirements and procedures for different things.
