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Processing the Crime Scene

Processing the Crime Scene. First responders job:SAFETY first (scene and victims)Secure the scenepeople, pressDon't move body w/o consent of coronerKeep witnesses separateGloves, goggles, shoe coversNo eating, drinking. Are all crime scenes processed the same way?. No, major work ups are d

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Processing the Crime Scene

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    1. Processing the Crime Scene Chapter 2

    2. Processing the Crime Scene First responders job: SAFETY first (scene and victims) Secure the scene people, press Don’t move body w/o consent of coroner Keep witnesses separate Gloves, goggles, shoe covers No eating, drinking

    3. Are all crime scenes processed the same way? No, major work ups are done only for a) severe crimes b) big-time burglaries

    4. Primary crime scene: site of crime Ex. Murder scene Secondary crime scene: related to the primary scene Ex. Site where body is dumped Ex. Suspect’s house

    5. Processing the Scene 1. preliminary walk-through (survey) 2. documentation 3. Proper collection (detailed search) 4. packaging 5. Preservation 6. Scene reconstruction

    6. 1. The walkthrough- Survey Be curious Be skeptical Identify the scope of the crime-scene and possible locations for evidence.

    7. Be curious! Murder / Burglary? Murder or Suicide? Insurance Fraud? Arson to cover another crime?

    8. 2. Documentation I)Photos II)Sketches III)Notes IV)Video

    9. I. Photos Start from wide-angle view and move in # all evidence Picture with ruler/picture w/o ruler Video used but should not be narrated or edited

    10. II. Sketches Rough sketch at scene Final sketch later Perspectives for sketches A. overhead (bird’s eye) B. Elevation (side view)

    11. Sketches Use at least 2 fixed points for each object Forensic surveyor may create 3-D models GPS may be used at large scenes

    12. III. Notes Be VERY detailed. Need to make sense years later

    13. IV. Video Do not add sound Do not edit Low resolution compared to a camera Do not interrupt once you have started taping. General --> specific

    14. 3. Proper Search/Collection Daylight better than artificial light Oblique lighting – from an angle

    15. Type of search Line or strip Grid Zone Wheel, ray spiral

    16. 4. Packaging Package fragile first (fingerprints) Send whole articles of clothing Bloodstains A. scrape B. transfer to wet swab C. cut out

    17. Packaging Forceps, pill bottles, envelopes, vials Druggist fold Do NOT put bloodstains in airtight cont. DO put charred fire debris in airtight container.

    18. Controls known standards for comparison to evidence

    19. Examples of Controls Ex. Control paint from suspect vehicle in hit and run Ex. Control hair from victim/suspect Ex. Control…Blood or cheek swab from victim/suspect Ex. Control (Unburned) samples of wood or carpet

    20. Packaging Submit to lab for testing Personal delivery mail

    21. 5. Preservation Secure area Chain of custody

    22. Chain of Custody Record of who handles the evidence Case # Description Initials Date Time Location Evidence #

    23. 6. Scene Reconstruction Hypothesize the likely sequence of events using: Shoeprints Fingerprints Tool marks Blood Bullet trajectories body

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