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PHYSICAL EVIDENCE.

Published byStuart Willis Modified over 7 years ago

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Presentation on theme: "PHYSICAL EVIDENCE."— Presentation transcript:

1 PHYSICAL EVIDENCE

2 Types of Evidence bsapp.com

3 Common Types of Physical Evidence
Blood, semen, and saliva Documents Drugs Explosives Fibers Fingerprints Firearms and ammunition Glass Hair Impressions Organs and physiological fluids Paint Petroleum products Plastic bags Plastic, rubber, and other polymers Powder residues Soil and minerals Tool marks Vehicle lights Wood and other vegetative matter PHYSICAL EVIDENCE

4 Documents Hand written Type or Printed Authenticity? bsapp.com

5 How “bagged and tagged”
Always wear gloves Flat envelope to fit the document

6 Glass How broken? Link a suspect to a crime scene Fingerprints Blood
bsapp.com

7 How “bagged and tagged”
No Paper or thin Plastic Thicker plastic, or boxes ONLY

8 Soils, Minerals, Wood, and Other Vegetative Matter.
Location Link suspect Trace Evidence bsapp.com

9 How to “Bag and Tag” Sturdy containers better than paper

10 Fingerprints Mainstay of Forensics Who is on file? bsapp.com

11 How to “Bag and Tag” Fingerprint card with print from crime scene

12 Hair What type? How removed? Match to a person DNA bsapp.com

13 Fibers Link suspect to a location or victim Origin? bsapp.com

14 Paint Origin Match bsapp.com

15 How to “Bag and Tag” Plastic or paper envelopes for the three previous slides

16 Firearms and Ammunition
Circumstances of discharge Link to suspect Link to weapon Link to victim bsapp.com

17 How to “Bag and Tag” Proper size Paper or Plastic envelopes
Cardboard boxes

18 Powder Residue Evidence of shooting Circumstances of shooting
Type of weapon bsapp.com

19 Explosives & Propellants
Link to suspect or victim Origin bsapp.com

20 Tool Marks Match tool to marks on control bsapp.com

21 How to “Bag and Tag” All of the 3 previous slides stored in manila evidence envelopes, boxes or jars

22 Impressions bsapp.com

23 bsapp.com

24 How to “Bag and Tag” Dental plaster casts of imprint Photographs

25 Drugs Type of Drug? Strength? Origin? Legal? bsapp.com

26 How to “Bag and Tag” Usually plastic bags, these placed in a larger container if necessary

27 Blood, Semen, Saliva, Organs, & other Physiological Fluids
Origin DNA Condition bsapp.com

28 How to “Bag and Tag” Plastic containers or small boxes for sterile swabs

29 bsapp.com

30 How to “Bag and Tag” Breathable, sterile containers
Air-dried before longtime storage

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