Crime Scene Investigation (CSI).pptx

FORENSIC SCIENCE
CRIME SCENE INVESTIGATION
SEARCHING OF CRIME SCENE
TYPES OF CRIME SCENE

1. CRIME SCENE INVESTIGATION (CSI) Dr. Moumita Sinha Ph.D. UGC-NET JRF Forensic Science

2. Concept and Principles of Forensic Science : Forensic science is science used for the purpose of the law and thus any branch of science used in the resolution of legal disputes is forensic science. The word forensic is rooted in Latin word forensis . The dictionary meaning of word the forensic is relating to court or law or relating to court of law. Forensic science subsists coming together with law and science.

3. Principles of Forensic Science

4. CRIME SCENE INVESTIGATION CRIME The word Crime is derived from the Latin root Cerno , meaning "I Decide, I Give Judgment. Crime is the breach of Rules or Laws for which some Governing Authority (via mechanisms such as legal systems) can Ultimately Prescribe a Conviction. CRIME SCENE or SCENE OF CRIME A crime scene is any physical scene, anywhere, that may provide potential evidence to an investigator. It may include a person's body, any type of building, vehicles, places in the open air or objects found at those locations. CRIME CRIMINAL VICTIM CRIME SCENE

5. GOAL OF CRIME SCENE INVESTIGATION 5 Ws & 1 H What happened ? Where did it happen ? When did it happen ? Why did it happen ? Who may have perpetrated these actions ? How was the incident carried out ?

6. TYPES OF CRIME SCENE: TYPES OF CRIME SCENE Based on evidence found on the crime scene Based on the geographical location of the crime scene Primary Crime Scene Secondary Crime Scene Outdoor crime scene Indoor Crime Scene Mobile/ Conveyance Crime Scene

7. Outdoor crime scene Indoor Crime Scene Mobile/ Conveyance Crime Scene “ ”

8. 7 S's STEPS OF CRIME SCENE INVESTIGATION: These are known as the 7 S's of crime scene investigation. Secure the Scene. Separate the Witnesses. Scanning of the Scene. Seeing the Scene (Photography, Videography). Sketching of the Scene. Search for Evidences. Secure and Collect Evidence.

9. EVIDENCE: Evidence is used at trials to prove or disprove certain facts that would tend to show whether something was true or not. There are four types evidence by which facts can be proven or disproven at trial which include: Real evidence- Physical Evidence Demonstrative evidence; Documentary evidence; and Testimonial evidence.

10. SEARCHING OF CRIME SCENE: There are several methods used by law enforcement agencies throughout the world that follow 07 basic crime scene search patterns. Link method Wheel method. Line method Spiral method. Grid method. Zone method. Strip Strip method.

11. SECURING COLLECTING EVIDENCE : All Evidence Needs to be Properly Packaged, Sealed and Labeled. The Evidence log should contain all Pertinent Information Including Case No Item Inventory No Description of the Evidence Name of Suspect Name of Victim Date Time of Recovery Signature of Person Recovering the Evidence Signature of any Witnesses Present

12. CHAIN OF CUSTODY OR CHAIN OF POSESSION * : The Sequence And Manner In Which Physical Evidence In Criminal And Civil Investigations Has Been Handled , Maintained And Processed Is Referred To As Chain Of Custody.