PHYSICAL EVIDENCE.

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Presentation transcript:

PHYSICAL EVIDENCE

Types of Evidence bsapp.com

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

Documents Hand written Type or Printed Authenticity? bsapp.com

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

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

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

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

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

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

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

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

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

Paint Origin Match bsapp.com

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

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

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

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

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

Tool Marks Match tool to marks on control bsapp.com

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

Impressions bsapp.com

bsapp.com

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

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

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

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

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

bsapp.com

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