Intro to Forensic Science_C4

Intro to Forensics/Lecture 4

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Intro to Forensic Science_C4

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Intro to Forensics/Lecture 4
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Slide Content
  1. Collection of Crime Scene Evidence

    Slide 1 - Collection of Crime Scene Evidence

    • Chapter 4
  2. Physical Evidence

    Slide 2 - Physical Evidence

    • Any object that can establish that a crime has been committed or can link a crime to its victim or perpetrator.
  3. Evidence collection Tools

    Slide 3 - Evidence collection Tools

    • Notebook
    • Pen (Black/blue)
    • Ruler
    • Chalk/Crayons
    • Magnifying glass
    • Flashlight (day & night)
    • Disposable forceps type tools
    • Scapels/Razor blades
    • Swabs & medicine droppers (presumptive tests)
    • Gause or sterile cloth
    • Unbreakable plastic pill bottles
  4. Slide 4

    • Evidence sealing tape
    • Evidence tags
    • Paper bags,boxes, etc
    • Alternate light sources
    • Lifting tape
    • Vaccum collector w/filter
    • Fingerprint powders
    • PPE’s
  5. Collecting and Packaging

    Slide 5 - Collecting and Packaging

    • Handling evidence
    • Packaging Evidence
    • Biological materials
    • DNA Evidence
    • Druggist fold
  6. Contamination

    Slide 6 - Contamination

    • The transfer of extraneous matter between the collector and the evidence or multiple pieces of evidence, producing tainted evidence that cannot be used in the subsequent investigation.
  7. Chain-of-Custody

    Slide 7 - Chain-of-Custody

    • A list of all people who came into possession of an item of evidence.
  8. Standard or Reference Sample

    Slide 8 - Standard or Reference Sample

    • Physical evidence whose origin is known, such as blood, or hair taken from suspect or victim.
  9. Buccal Swab

    Slide 9 - Buccal Swab

    • A swab of the inner portion of the cheek; performed to collect cells for use in determining the DNA profile of an individual.
  10. Substrate Controls

    Slide 10 - Substrate Controls

    • Surface material close to areas where physical evidence has been deposited.
  11. Submitting Evidence

    Slide 11 - Submitting Evidence

    • Agency
    • FDLE
    • FBI
  12. Crime Scene Safety

    Slide 12 - Crime Scene Safety

    • MSDA’s
    • Blood borne pathogens
    • PPE
  13. Legal Considerations at the Crime Scene

    Slide 13 - Legal Considerations at the Crime Scene

    • Search and seizure covered by Fourth Amendment
    • 1960’s saw several decisions by the SCOUS which impacted law enforcement searches
    • Four warrant less search situations
    • Mincey Case (Homicide)
    • Tyler Case (Fire scene investigation)
  14. Closing

    Slide 14 - Closing