University:
Eastern Kentucky University
Course:
CRJ 101 | Introduction to Criminal Justice
Academic year:

2022
Views:

285

Pages:

4
Author:

Alma Hester

Crime Crime--Scene Investigation and Evidence Collect Collectio io Tuesday, October 4, 2022 7:54 AM Locard's Principle of Exchange - When a person comes in contact with an object or another person, a cross-transfer of physical material can occur - The intensity, duration, and nature of the entities and contact determine the extent of th transfer. Types of Evidence - Direct evidence ○ First hand observations - Circumstantial evidence ○ Indirect evidence that can be used to imply a fact but that does not prove it ○ Could be physical or biological - Class evidence ○ Narrows an identity to a group of persons or things - Individual evidence ○ Narrows an identity to a single person or thing The Crime Scene Investigation Team - Police officers - Crime scene investigators - Medical examiners - Detectives - Specialists The Seven S's of Crime Scene Investigation 1. Safety 2. Securing the scene 3. Separating the witnesses 4. Scanning the scene 5. Seeing the scene 6. Sketching the scene 7. Searching for evidence 8. Securing and collecting evidence Packaging Evidence - The paper bindle is deal packaging for small, dry, trace evidence Search patterns depend on the crime scene - Size - Type - How many people there are Mapping the Outdoor Crime Scene - Datum points and subdatum points - Marking evidence collecting limits - measuring and marking evidence positions Analyze the Evidence - Forensic lab technicians are specialized to process only one type of evidence Crime Scene Reconstruction - Crime scene reconstruction involves: ○ Forming a hypothesis of a sequence of events from before the crime was co through its commission ○ Comparing the evidence to witnesses statements - Investigators need to maintain an open mind as they examine all possibilities Staged Crime Scenes - Commonly staged types of crime scenes include: ○ Arson ○ ○ ○ Arson Murder staged to look like a suicide burglary

Crime-Scene Investigation and Evidence Collection

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