This document discusses crime scenes and physical evidence. It defines a crime scene as any location where a crime was committed or evidence may be found. Crime scenes can be indoors, outdoors, or involve vehicles or open areas. Physical evidence includes anything related to people or objects and is important for criminal investigations. The document outlines Locard's principle of exchange, which states that contact between two objects will result in an exchange of material. It also notes some limitations of physical evidence and importance of properly preserving, recording, and searching crime scenes to find evidence.

1. SCENE OF
OCCURRENCE

2. CRIME SCENE - MEANING
• A Crime Scene is any physical scene, where the crime is committed (
Primary Crime Scene) or anywhere that may provide potential evidence
to an investigator ( Secondary Crime Scene).
• It may include any type of building, vehicles, places in the open air or
objects found at that location
• Crime scenes may or may not be where the crime was committed.
• Hence, crime scene cannot limited to one place

3. Crime
Scene
Indoor
Crime
Scene
Outdoor
Crime
Scene

4. DIVISION OF CRIME SCENE
Line of
Approach
Point of
Entry
Actual
Scene
Point of
Exit
Line
Retreat

5. PHYSICAL EVIDENCE - MEANING
• All criminal Investigations are mainly concerned with either
people or the things.
• These things together constitute the physical evidence

6. LOCARD’S PRINCIPLE OF
EXCHANGE
“ When two objects come into contact, there
is always an exchange of material”

7. LIMITATIONS
Physical evidence is often destroyed by inmates and
onlookers
Unless the real culprit is found soon it may be of little
avail
If the clue is not noticed it may loose its value as
evidence
The Forensic Science Laboratories are not adequate
enough to cater to the needs of the Investigating Officer

8. • Preservation of the Crime Scene
• Recording of Crime Scene
• Methodic Search for evidence

9. RECORDING OF CRIME SCENE
Recording of
notes
Sketching
the crime
scene
Photographs
of the crime
scene

10. METHODIC SEARCH FOR EVIDENCE
How to look for?
• Indoor Crime Scene
• Outdoor Crime Scene
Where to look for clues?
What to look for?

11. VALUE OF THE TRACED EVIDENCE
• Common Material
• Rare Material
• Rare Situation
• Collective Nature

12. Thank You