U7 Crime Scene Investigation Basics
43 Questions
0 Views

U7 Crime Scene Investigation Basics

Created by
@EuphoricZeugma

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the first priority in responding to a crime scene?

  • Obtaining medical assistance for individuals in need (correct)
  • Interviewing the witnesses
  • Securing the evidence
  • Documenting the crime scene

    • Why is it important to separate witnesses at a crime scene?

  • To prevent them from influencing each other (correct)
  • To ensure they are all documented
  • To speed up the investigation process
  • To allow them to share their stories

    • What is used during the scanning of the crime scene?

  • Witness statements
  • Chain of Custody logs
  • Evidence markers (correct)
  • Entrance Log

    • What does the sketch of the crime scene represent?

    <p>Dimensions and location of evidence</p> Signup and view all the answers

    How do investigators ensure thorough evidence collection?

    <p>By performing a declared search pattern</p> Signup and view all the answers

    What is the purpose of using evidence markers?

    <p>To identify and document location of evidence found</p> Signup and view all the answers

    What is the function of a forensic photographer at a crime scene?

    <p>To document evidence with photographs</p> Signup and view all the answers

    What should be done after photographing the evidence?

    <p>Sketch the crime scene</p> Signup and view all the answers

    What is the purpose of using disposable gloves when handling evidence?

    <p>To ensure the integrity of the evidence is maintained</p> Signup and view all the answers

    How should evidence be packaged to maintain its integrity?

    <p>In appropriate packaging sealed with evidence tape</p> Signup and view all the answers

    What does the chain of custody ensure?

    <p>That evidence is tracked and protected from the crime scene to the lab</p> Signup and view all the answers

    What should be done if evidence must be processed after collection?

    <p>Remove it and place it in a new package with a new seal</p> Signup and view all the answers

    What is a bindle used for?

    <p>To secure tiny pieces of evidence</p> Signup and view all the answers

    What is essential to include in the chain of custody log?

    <p>The names of everyone who handled the evidence</p> Signup and view all the answers

    Why must evidence remain unmoved until documentation is completed?

    <p>To prevent any changes or loss of important details</p> Signup and view all the answers

    What happens if the evidence seal is broken?

    <p>The evidence is immediately considered invalid</p> Signup and view all the answers

    What is essential for a criminal laboratory to function effectively?

    <p>Evidence</p> Signup and view all the answers

    Which group is responsible for collecting and documenting evidence at a crime scene?

    <p>Crime scene investigators</p> Signup and view all the answers

    What is the primary function of the chain of custody in forensic investigations?

    <p>To maintain the integrity of evidence</p> Signup and view all the answers

    Which step in crime scene investigation involves documenting the details of the scene?

    <p>Sketching the Scene</p> Signup and view all the answers

    Who is usually the first to arrive at a crime scene?

    <p>First responders</p> Signup and view all the answers

    What is the main goal during the 'Searching the Scene' step of a crime scene investigation?

    <p>To find and secure all evidence</p> Signup and view all the answers

    What does separating witnesses achieve at a crime scene?

    <p>To prevent contamination of evidence</p> Signup and view all the answers

    Just as a car needs fuel to run, criminal laboratories also need ______ to run.

    <p>EVIDENCE</p> Signup and view all the answers

    The documentation that records the sequence of custody and control of evidence is known as the ______ of evidence.

    <p>chain</p> Signup and view all the answers

    The first officer arriving at the crime scene must preserve and protect the ______ as much as possible.

    <p>area</p> Signup and view all the answers

    During the crime scene investigation, investigators follow steps such as securing the scene and ______ witnesses.

    <p>separating</p> Signup and view all the answers

    Before evidence can be used, its presence must be recognized at the ______.

    <p>crime scene</p> Signup and view all the answers

    Priority should be given to obtaining medical assistance for individuals in need and to arresting the ______.

    <p>perpetrator</p> Signup and view all the answers

    Every individual who enters the scene must be documented in ______ as well as the time and date they entered and exited.

    <p>crime scene logs</p> Signup and view all the answers

    Witnesses must not be allowed to talk to one another to avoid ______ each other’s accounts.

    <p>influencing</p> Signup and view all the answers

    A trained forensic photographer will photograph the evidence that has been ______.

    <p>marked</p> Signup and view all the answers

    Physical evidence can be anything from massive objects to ______ traces.

    <p>microscopic</p> Signup and view all the answers

    Evidence can be used to exclusively convict a defendant.

    <p>False</p> Signup and view all the answers

    The chain of custody ensures that evidence maintains its integrity during transfer and analysis.

    <p>True</p> Signup and view all the answers

    Crime scene investigators do not need to separate witnesses at a scene.

    <p>False</p> Signup and view all the answers

    The first officer arriving at the scene is responsible for sketching the crime scene.

    <p>False</p> Signup and view all the answers

    Forensic science begins at the crime scene with the recognition of evidence.

    <p>True</p> Signup and view all the answers

    All unauthorized persons must be allowed to enter the crime scene for documentation purposes.

    <p>False</p> Signup and view all the answers

    Witnesses are separated at a crime scene to prevent them from influencing each other's accounts.

    <p>True</p> Signup and view all the answers

    The sketch created during a crime scene investigation should not align with the photographs taken.

    <p>False</p> Signup and view all the answers

    A quick scan of the crime scene is performed before marking evidence with evidence markers.

    <p>True</p> Signup and view all the answers

    Physical evidence collected from a crime scene can include only large objects.

    <p>False</p> Signup and view all the answers

    Study Notes

    Investigative Processes: Crime Scene Investigation

    • CSI Basics: Criminal labs need evidence to operate, and evidence can make or break a case. Evidence is used to convict, exonerate, or prove a defendant.

    • CSI Starts at the Scene: Evidence presence must be recognized at the crime scene for it to be usable. Forensic science begins at the crime scene. Proper preservation is crucial. If the investigator can't properly recognize, preserve, or perform a lab examination, the evidence is useless. Proper training is key for competent performance at crime scenes.

    • Crime Scene Personnel: The following personnel are typically at the crime scene:

      • First responders (law enforcement, paramedics, fire fighters)
      • Crime scene investigators (document scene, collect evidence)
      • Medical examiners/coroners (determine cause of death)
      • Detectives (investigate leads, interview witnesses)
      • Specialists (entomologists, psychologists, anthropologists, sketch artists)

    • Chain of Custody: Investigators follow steps to ensure evidence is found, secured, collected, and maintained throughout the process from crime scene to court. The chronological documentation is crucial and is called the chain of custody. It records custody, control, transfer, analysis, and disposition of physical and electronic evidence.

    • Steps of CSI: The investigative process includes:

      • Securing the scene (priority to medical, arresting, exclusion of unauthorized).
      • Separating witnesses.
      • Scanning the scene.
      • Seeing (photographing) the scene.
      • Sketching the scene.
      • Searching the scene (thorough search for all evidence).
      • Securing and collecting evidence (handling, preserving, packaging).

    • Securing the Crime Scene: The first officer to arrive must preserve and protect the crime scene, prioritizing medical assistance and suspect arrest. All unauthorized personnel should be excluded after ensuring everyone's safety. Ropes/barricades are common methods. Individuals entering need documentation (time, date, purpose).

    • Separating Witnesses: Witnesses should not speak to each other. This prevents influence on testimony.

    • Scanning the Scene: Investigators first do a quick scan of the crime scene to identify and mark evidence. This allows for more efficient note-taking later.

    • Seeing/Photographing the Scene: A trained photographer takes photographs of marked evidence. Any new evidence found is also photographed.

    • Sketching the Scene: A rough sketch is made to show the dimensions and location of the evidence. The sketch should align with photos and evidence markers.

    • Searching the Scene: Investigators thoroughly search the scene, using a planned strategy, to locate all evidence.

    • Securing and Collecting Evidence: Physical evidence (massive to microscopic) must be preserved in its original state. Evidence is handled carefully and wrapped separately to avoid contamination.

    • Packaging Evidence: Packaging differs based on evidence type and its needs.

      • Small items: bindles (druggist's fold)
      • Larger items: paper bags or wrapping
      • Fragile/dangerous items: specialized packaging (tubes, boxes)
      • Items needing special protection (must be refrigerated or protected from environmental damage) require specific procedures. Arson evidence needs vapor-proof containers.
      • Evidence is packaged in a way that preserves it's condition.
      • Procedures need to be followed for evidence security (using security tape, signatures)

    • Chain of Custody Continued: The person handling the evidence needs full documentation in a log. The evidence must be moved (to a lab for instance) in a new container with a new seal, to maintain integrity and prevent tampering.

    • Tiny Evidence: Tiny evidence is placed in a bindle/druggist's fold.

    • Next Steps: Crime scene evidence is sent to a lab. Each person handling the evidence is documented on the chain-of-custody log to prove the unaltered chain.

    • Additional Considerations: Special procedures are used for vulnerable and dangerous evidence like blood, firearms, sharp objects, etc.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Investigative Processes Lesson PDF

    Description

    Explore the fundamental concepts of crime scene investigation in this quiz. Learn about the importance of evidence, crime scene personnel, and preservation techniques crucial for forensic science. Test your knowledge on the roles and responsibilities at a crime scene.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser