Download Investigative Principles Evidence

Academic Criminal
Justice Course
Module 10:
Investigative
Principles
Course Facilitator:
Professor
Leon Strigotte
Investigative Principles
What is Forensics?
Application of science to the purpose of law.
Locard’s Principle of Exchange
+
Scientific Consistencies = TRUTH
Investigative Principles
Forensic Disicplines
Pathology
Anthropology
Entomology
Psychiatry
Odontology
Engineering
Botany
Toxicology
Jurisprudence
Criminalistics
(Generalists)
Medical
Digital
Investigative Principles
Laboratory Sections
 Digital Evidence
 Drug Chemistry & Toxicology
 Firearms & Toolmarks
 Forensic Biology/DNA
 Latent Evidence
 Trace Evidence
 Questioned Documents
 Digital Forensics
Investigative Principles
Scientists & Professional Organizations
The International Association for Identification
American Academy of Forensic Sciences
Association of Property & Evidence
Investigative Principles
Evidence
1. Secure the scene
2. Identify Evidence
3. Collect & Preserve
4. Document!
Investigative Principles
Major Roles of Evidence
 Identification
Ex: Questioned Documents
 Comparison
Ex: Fingerprints
 Reconstruction
Ex: Bullet Trajectory
Investigative Principles
Crime Scene “Layers”
Investigative Principles
Crime Scenes
 Safety of personnel is paramount
 Required Elements of Property Control:
 Written Directives
 Logging
 Receipts
 Packaging
 Release
 Checks & Balances
 Staff: Sworn or Civilian?
Investigative Principles
Chain of Custody
Every Scene, Every time!
Investigative Principles
Players & Roles
EVIDENCE
Investigative Principles
Evidentiary Standards
Daubert Standards (1993)
Relevant & Reliable
Fits the case & uses Scientific Method
Khumo Tire (1999)
Extends Daubert to all types of testimony. Judges
use industry standards to determine reliability.
Investigative Principles
Crime as Entertainment
Investigative Principles
Crime Scene Exercise