crime_scene_proceeding_8109379004727262728828.pdf

Crime scene pdf

1. Crime Scene Investigation
Proceeding and case study
Dr. Pankaj Patidar
Scientific Officer
State Forensic Science Laboratory
Sagar(M.P.)

2. Theory v/s Reality: Challenges
Theory: well protected crime scene, well equipped
team with some magic tricks and “TV CID” Image
Reality: There is no typical crime scene, there is no
typical body of evidence and there is no typical
investigation approach. Scientific fact is our magic.
Challenges: Quick response in adverse condition
(light, weather, road, law& order, public interfere.. )
“Culprit should not escape, Innocent should not be
punished”

3. Unit Structure and Work
In every district of M.P. -One Scene of Mobile Unit
is working
Scientific officer, Fingerprint expert, Photo-grapher,
Dog handler
Work:
(a) documentation of crime scene
(b) Search, collection and Preservation of evidences
(c) reconstruction of crime scene
(d) forwarding the preserved evidences for
appropriate examination

4. C S I: Science + Common sense
Locard’s Principle, Blood Pattern Analysis,
Modus Operandi, and Forensic Facts
Accused
Victim
Crime
scene
Justice
Medical
Expert
Forensic
Prosecution
Police
Locard’s
Principle

5. Crime Scene Analysis
Information Reach ASAP Preserve the scene
Direct
evidence
Is It
Crime
What Happened
How did it happened
When did it happen
Where did it happen
Who did it
Why did it committed
Physical
Evidences

6. What happened??
Nature of
Incidence
Suicidal
Homicidal
Accidental
Natural
How did it happened??
Mode of
Death
C.R.A
Shock/Coma
Syncope
(Medical term.)
Cause of Death:
Primary clue
Hanging, Drowning,
Burning, Poisoning,
Shock, blood loss,
Injury, Rail cutting and
many more

7. When did it happen??
Time of Death / Incident :
Post mortem
changes
(lividity, rigor
mortis) and
Condition of
physical
evidences:
(Vomitus/blood/
urine/saliva/
food/smell)

9. Where / Who / Why
•Whether it is actual crime scene or secondary
spot or mobile (moving) crime scene.
Who did: Search the physical evidences / verify
the supplied information, if any / police
investigation
Why: subject of police Investigation or similar
modus operandi (serial killer/ psycho)

10. CSI Report

11. Types of Physical Evidences
•Physical Evidence-encompasses any & all objects
that can establish that a crime has been committed or
can link a crime & its victim or its perpetrator.
Biological:-Blood, Semen, Saliva, Hair, sweat, bone,
Urine, Vomit….
Chemical:-alcohol, medicine / Drug, Toxins,
Cosmetics, Petroleum product...
Physical:-Tyre and tool mark, Weapon, Fibers, Foot
prints, cloth, button, Cigarette but,
Miscellaneous:-Fingerprints, Documents, Spit,
laundry mark, voice…

12. Searching of Physical Evidences

13. Collection of Evidences
Somegeneraltechniquesofcollectionofphysical
evidencesare:HandPicking/Swabbing/Tape-Lifting
Anyevidencethatiswetmustbeairdriedbefore
beingplacedinacontainer.
Eachdifferentitemorsimilaritemscollectedfrom
differentlocationsmustbeplacedinseparate
containers.
Volatile material must be placed in air tight
containers.
All collected material should be labeled with relevant
information.

14. Preservation of Evidences
Preservation of evidences necessary: to prevent them
(i)From Loss (ii) From Deterioration
(iii) From Contamination (iv) From Tempering
Preservation : How
Viscera for Toxicological analysis : Saturated solution of NaCl
Viscera for Histopathologicalanalysis: 10% formalin solution
Blood for Toxin analysis : sodium fluoride + Pot. oxalate
Blood for DNA examination : EDTA vial
Vomit material or Blood from surface/cloth: Air dried first and
collect as it is.
Physical object (weapon or firearm) : as it is and wrapped well.
Fragile material: Use box with cotton/thermacol

15. Packing of physical evidences
+
Poly bags Proper packing of weapons
Packing in paper envelop

16. Forwarding for examinations
•Documents needed
–Forwarding Note (S.P. Memo)
–Certificate for fragmentation or Use
–FIR / UDR Copy
–Property Seizure Memo copy
–PM Report or MLC Certified copy
–Seal Sample and Panchnama
–Reason of late / Tri-stariyaform (त्रिस्तरीय)
All documents should be attested and readable.
All articles should be well packed, labeled and sealed.
All questions should be appropriate and sensible.

17. Case Studies
Overview of different type of Cases
•Hanging
•Drowning
•Burning
•Poisoning
•Rail cutting
•Murder
•Rape & Murder
•Fire arm cases
•Road Accident
•Animal Bite
•Arson
•Accidental death
•Thunderbolt
•Electric current
•Theft / Robbery
•Blast
•Mysterious
Commonly encountered: Hanging, Burning,
Drowning, Poisoning, Rail cutting, Rape and murder

18. Hanging
•Complete, Partial, Unusual
•Body in hanged condition or lay down
Only pressure on neck matters. 3-5 Kg weight on Jugular vein
Carotid artery .

19. Hanging: Observations
•Type: typical or atypical; complete or partial
hanging
•Line of Approachat point of anchor,
Ligature material, knot pattern,
•Body feature: Ligature mark, head position,
saliva, eye, tongue, hand & Foot, any injuries
•Circumstantial evidence: entry-exit (Indoor
scene), transfer of traces (dust/paint), Urine /
stool flow, note, etc….

20. Hanging: Real Case study 1

21. Hanging: Real Case study 1
Ligature mark, type of knot,
Any Mark on body???
Any written material in
pocket or nearby

22. Hanging: Real Case study 2
Single ligature material
Direction of fluid
Mobiles and foot wear
No sign of struggle

23. Burning: Observations
Crime scene: Indoor/ Outdoor
Time of incident as per history
Crime scene preserved or not
Correlation with supplied information
Degree and % of Burn
1°: Superficial burn (redness)
2°: Blister formation
3°: Destruction of superficial skin
4°: Destruction of whole skin
5°: Destruction of muscles
6°: Complete charring

24. Burning: body observations
Burn area and intensity
Body posture and eye, tongue, hair, hands and feet
Burnt/unburnt cloths and ornaments
Smell of fuel media
Body fluid purging

25. Burning: spot observations
Fuel media and ignition
Soot deposition
Heat effect on surrounding
Dispersion of items
Entry-exit possibility

26. Burning: Real case study 1

27. Burning: Real case study 2

28. Drowning
Body position in water
Depth of water body
Injury if any
Foot wear and circumstances
**Rahatgarh(mother-son); Aman-anuj

29. Drowning or Strangulation

30. Suspicious story: Blood Speaks

31. Blood drop
Different
shape and size

32. Preetam Yadav murder: 27 day old body

35. Train Cutting??

39. ROAD ACCIDENT

40. T H A N K S
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