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Chapter 3 The Crime Scene

Chapter 3 The Crime Scene. Objectives. The steps to take when processing a crime scene. That type of evidence determines what packaging should be used. Why the chain of custody must be preserved. Isolate, record, and search for evidence at a mock crime scene.

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Chapter 3 The Crime Scene

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  1. Chapter 3 The Crime Scene

  2. Objectives • The steps to take when processing a crime scene. • That type of evidence determines what packaging should be used. • Why the chain of custody must be preserved. • Isolate, record, and search for evidence at a mock crime scene. • Collect and package evidence at a mock crime scene using proper forensic procedures.

  3. At the crime scene • Place where evidence may be located and gathered and analyzed. • Modus operandi is the method of operation of a criminal. Referred to as MO.

  4. Preserving and isolating the crime scene The steps involved; • Provide medical assistance • Make arrests if necessary • Protect evidence • Interview witnesses • Record details

  5. Observing, documenting, collecting, and packaging the scene • Find evidence, determine what happened • Survey crime scene • Take notes- measure, describe location/environmental conditions, names of people involved…. • Take photos or video, sketch crime scene (made to scale). • Search scene for evidence – zone method • Collection of physical evidence

  6. Groups • First police officers on the scene – secure crime scene • Investigator(s) – take notes, take measurements, draw crime scene • Photographer- record scene with photographs or video • Collection of evidence – collect and bag evidence • Lab experts – soil, hair, fibers, fingerprints, blood, footprints, handwriting, and chromatography

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