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Collecting Evidence

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 disposable forceps if needed. Categories of evidence .

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Collecting Evidence

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  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. Evidence Collection Kits • Put these on your list of presents for Mrs. Costello • www.evidentcrimescene.com/cata/kits/kits.html

  8. 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

  9. 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

  10. This is how we should look in lab….

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