Collecting Evidence - PowerPoint PPT Presentation

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Collecting Evidence

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Collecting Evidence Collecting .FIRST OF ALLL Photograph before any collecting is done Wear gloves, mask,& Tyvec suit so as not to contaminate the evidence Use ... – PowerPoint PPT presentation

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Title: Collecting Evidence


1
Collecting Evidence
2
Collecting.FIRST OF ALLL
  • Photograph before any collecting is done
  • Wear gloves, mask, Tyvec suit so as not to
    contaminate the evidence
  • Use disposable forceps if needed

3
Categories of evidence
4
Trace evidence tiny samples that can be
transferred between people and objects (fibers,
paint residue, glass fragments,hair)
  • To collect trace evidence, a CST might use
    tweezers, plastic containers with lids, a
    filtered vacuum device, a knife and a biohazard
    kit

5
Hair and fibers
  • A CST may use combs, tweezers, containers, tape,
    and a filtered vacuum device to collect any hair
    or fibers at the scene.

6
Packaging
  • Fibers Dry trace evidence in druggist's folds,
    envelopes, and canisters
  • Documents In plastic covers.
  • Liquids Unbreakable, airtight, sealed and
    accelerants.
  • Wet Biologicals Non-air tight containers, to
    prevent mold, mildew, and decay.
  • DNA Collect with swab,allow to dry, place in
    special DNA evidence box, take control swab.

7
(No Transcript)
8
Evidence Collection Kits
  • Put these on your list of presents for Mrs.
    Costello
  • www.evidentcrimescene.com/cata/kits/kits.html

9
Evidence Labeled with.
  • Name and initials of person who found evidence
  • Case number
  • Name and description
  • Witnesses if any
  • Date, time, and location
  • COC..Chain Of Costody

10
Chain of Custody
  • Every person who comes in contact with the
    evidence must sign and date and mark the time on
    evidence bag, then reseal the bag
  • This eliminates the possibility of tampering with
    evidence
  • It is the most important factor in a court of law
  • It is one of the reasons OJ was a free man

11
This is how we should look in lab.
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