This document discusses the importance of crime scene investigation, including the collection and preservation of evidence. It emphasizes that physical evidence found at a crime scene can provide crucial details about the how, what, why of a crime and help identify victims and offenders. It outlines best practices for processing a crime scene such as isolating and securing the area, documenting the scene thoroughly, searching methodically for evidence, collecting and packaging evidence maintaining a proper chain of custody, and submitting evidence to a crime lab. The document stresses that following proper protocols in investigating and documenting a crime scene is essential for obtaining factual evidence that can be used to determine the truth and administer justice.

1. IMPORTANCE OF CRIME SCENE:
COLLECTION & PRESERVATION OF
EVIDENCE
Presented By:
Abdul Hafeez Bhutta Hammad Ahmed Qureshi
Group Members: Zubair Ahmad
Syed Ameer Abbas MB.Din Ikram Haider
Rizwan Yousaf Syed Amir Abbas Sahiwal
Hassan Mahmood Asghar Hayat

2. EVIDENCE / JUSTICE
O you who believe! stand out firmly for
justice, as witnesses to Allah, even as against
yourselves, or your parents, or your kin, and
whether it be (against) rich or poor: for Allah
can best protect both. Follow not the lusts (of
your hearts), lest you swerve, and if you
distort (justice) or decline to do justice, verily
Allah is well-acquainted with all that you do.
(Surah Nisa – Verse 135)

3. Forensic Science
"Wherever he steps, wherever he touches, whatever he
leaves, even without consciousness, will serve as a silent
witness against him his fingerprints or his footprints, but his
hair, the fibers from his clothes, the glass he breaks, the
tool mark he leaves, the paint he scratches, the blood or
semen he deposits or collects. All of these and more, bear
mute witness against him. This is evidence that does not
forget. It is not confused by the excitement of the moment.
It is not absent because human witnesses are. It is factual
evidence. Physical evidence cannot be wrong, it cannot
perjure itself, it cannot be wholly absent. Only human
failure to find it, study and understand it, can diminish its
value.“
Dr. Edmond Locard (13 December 1877 – 4 May 1966)

4. “Every contact leaves its trace.”

5. Crime Scene
Any physical location in which a crime has
occurred or is suspected of having occurred.
 PRIMARY CRIME SCENE: The original location
of a crime or accident.
 SECONDARY CRIME SCENE: An alternate
location where additional evidence may be
found.

6. The ABC of Investigation
• Assume nothing
• Believe no one
• Check everything

7. Why Crime Scene Is Important??
• The Identity of the Victim…
• The How, What and Why…
• Mental Culpability…
• Who is (are) the Offender(s)…
• Evidence…

8. Processing a crime scene
• Isolate and secure the scene
• Document the scene
• Search for evidence
• Collect and package evidence, maintaining the
chain of custody
• Submit evidence to the crime lab

9. Search Strategy, Basic Principles
A crime scene search is planned, coordinated,
and executed by law enforcement officials to
locate physical evidence.
Crime scenes involving suspected or confirmed
weapons of mass destruction (WMD) (nuclear
and/or radiological, biological, chemical, or
explosive agents) should be handle only by
qualified personnel.

10. The First Steps
• The first officer to arrive at the scene is
responsible for securing the crime scene.
• First priority should be given to obtaining medical
assistance for individuals in need of it and to
arresting the perpetrator.
• As soon as it is possible, extensive efforts must be
made to exclude all unauthorized personnel from
the scene.
• Once the scene is secured, the preliminary exam
must begin.
• Recording of the crime scene becomes a critical
piece to the investigation process.

11. Recording Methods
• Photography
• Sketches
• Notes
• Videography

12. Search Strategy, Preparation
 Personnel
• Briefing of involved personnel
 personnel assignment
 types and handling of evidence
• Manpower
• Supply (food, water, medical assistance … )
 Equipment
• Packaging material
• Protective clothing for personnel
 Documentation
• Paperwork (a. o. handover from shift to shift)
• Photograph, videotaping

13. Search Strategy, Staff
Personnel/ Responsibilities:
 Team Leader
 Photographer
 Sketch Preparer
 Evidence Recorder
 Evidence Recovery Personnel
 Specialists
…

14. Search (Patterns)
 Use a search pattern (grid, parallel or spiral).
 Search for evidence from the general to the
specific.
 Be alert for all evidence.
 Search entrances and exits.

15. Collecting and packaging evidence
• One individual should be designated as the evidence
collector to ensure that the evidence is
• collected, packaged, marked, sealed, and preserved i
n a consistent manner
• Each item must be placed in a separate container, se
aled, and labeled
• Most fragile is collected and packaged first
• Different types of evidence require specific or special
collection and packaging techniques

18. Packaging and Preserving Evidence

19. Right or Wrong?

20. Right or Wrong?

21. Right or Wrong?

22. Right or Wrong?

23. Right or Wrong?

24. Thank You

25. Any Questions??