Crime Scene Investigation - Chapter 3

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Questions and Answers

What is the primary purpose of crime scene investigation?

  • To arrest suspects immediately
  • To identify, document, and collect evidence (correct)
  • To interrogate witnesses present at the scene
  • To secure the crime scene from crowds

Which of the following is classified as trace evidence?

  • Blood (correct)
  • Witness testimony
  • Surveillance footage
  • Victim's statement

What should be done with wet evidence during collection?

  • It should be packed directly into a plastic container. (correct)
  • It should be left to air dry first.
  • It does not need special handling and can be discarded.
  • It should be packed in a paper envelope.

Which of the following accurately describes individual evidence?

<p>It narrows the identity to a single person or thing. (B)</p> Signup and view all the answers

What is the first priority during a crime scene investigation?

<p>Securing the area and ensuring safety (D)</p> Signup and view all the answers

What principle states that intensity, duration, and nature of contact affect transmission?

<p>Principle of exchange (D)</p> Signup and view all the answers

Which examples represent direct evidence?

<p>Surveillance footage and fingerprints (D)</p> Signup and view all the answers

Which item is NOT an example of trace evidence?

<p>A replica firearm (A)</p> Signup and view all the answers

Flashcards

Crime Scene Investigation Purpose

Identifying, documenting, and collecting evidence at a crime scene.

Trace Evidence Definition

Evidence exchanged at a crime scene (e.g., fibers, hairs, blood).

No Traces Found

No physical evidence found at a crime scene.

Trace Evidence Types

Includes items like blood, hairs, makeup, and more, used to connect a suspect to a crime.

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Direct vs. Indirect Evidence

Direct evidence proves the crime directly; indirect evidence suggests, but doesn't directly prove, the crime.

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Medical Examiner's Role

The medical examiner is the first to search for evidence at a crime scene.

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First Priority at Crime Scene

Ensuring the safety of individuals at a crime scene is paramount.

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Witness Interactions

Witnesses may speak to each other at a crime scene or investigation.

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Wet Evidence Packaging

Wet evidence should be packed directly into plastic containers.

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Trace Evidence Examples

Trace evidence encompasses various items like blood, hair, fingerprints, shoe prints, plant and animal parts, and weapons.

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Locard's Principle

The principle of exchange stating contact leaves traces; the intensity and duration of contact affects the transfer.

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Class Evidence

Evidence that narrows an identity to a group or class of items or people.

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Individual Evidence

Evidence that narrows an identity to a single person or thing.

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Crime Scene Investigation Team

A team of professionals systematically investigates a crime scene, collecting and documenting evidence.

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Evidence Handling

Evidence must be packed and sealed properly (e.g., using plastic containers) for lab analysis.

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Study Notes

Crime Scene Investigation - Chapter 3

  • Purpose of crime scene investigation: Identify, document, and collect evidence.
  • Trace evidence: Exchanged during a crime, acting as a silent witness.
  • No traces: Absence of evidence, meaning no traces of people or things are found.
  • Trace evidence type: Circumstantial evidence.
  • Direct evidence: Evidence directly proving a crime.
  • Medical examiner's role: First to arrive at the crime scene to search for evidence.
  • Safety priority: First priority is the safety of all individuals in the area.
  • Witness interaction: Witnesses may speak to one another.
  • Wet evidence packaging: Wet evidence should be placed directly into a plastic container.
  • Trace evidence examples: Blood, hair, makeup.
  • Intensity, duration, and nature: Contact materials determine the extent of transmission.
  • Trace evidence principle: Locard's principle and principle of exchange.
  • Biological evidence examples: Fingerprints, shoe prints, plant and animal parts.
  • Types of evidence: Class evidence (narrowing down), individual evidence (identifies a single person), physical evidence.
  • Crime scene investigation team: Includes police officers, specialized personnel/experts.
  • Proper evidence handling: Evidence must be packaged, sealed, and labeled.
  • Determining search warrants: Specialists, medical examiners, crime-scene investigators, and prosecutors may determine if a search warrant is necessary.
  • Evidence types: Includes direct observations (eyewitness accounts), indirect evidence (not directly linking), and circumstantial evidence (indirectly suggest).

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