Chapter 2 Securing and Searching the Crime Scene
Arrival at the Crime Scene <ul><li>First arriving officer: </li></ul><ul><ul><li>Medical assistance for injured victims </...
Securing the Crime Scene <ul><li>Establish appropriate boundaries </li></ul><ul><li>Secured area should include actual cri...
<ul><li>Post officers to restrict access  </li></ul><ul><li>Crime scene log  </li></ul><ul><li>Investigators should  never...
<ul><li>Walkthrough (initial survey)  </li></ul><ul><li>Points of entry/exit  </li></ul><ul><li>Indirect path to the cente...
<ul><li>Primary Crime Scene </li></ul><ul><li>-location of initial crime  </li></ul><ul><li>Secondary Crime Scene </li></u...
<ul><ul><li>Staging area outside crime scene. </li></ul></ul><ul><ul><li>Lead investigator assigns tasks.  </li></ul></ul>...
<ul><li>Thorough and systematic.  </li></ul><ul><li>Search pattern depends on the size/locale  and the number of collector...
<ul><li>Line/Strip Search Pattern </li></ul><ul><li>-Start at the boundary of the crime scene and search in straight lines...
<ul><li>Spiral Search Pattern </li></ul><ul><li>-Boundary inwards in a circular pattern </li></ul><ul><li>Quadrant/Zone Se...
<ul><li>Lead investigator: </li></ul><ul><li>-decides when all evidence is recorded/collected  </li></ul><ul><li>Final sur...
Crime scene <ul><li>Examine this scene closely: </li></ul><ul><li>-wheelchair </li></ul><ul><li>-signs of forced entry? </...
Securing the crime scene <ul><li>Actual crime scene </li></ul><ul><li>Enthusiasm can be dangerous! </li></ul><ul><li>-note...
Crime scene <ul><li>How many people should you let into the crime scene? </li></ul><ul><li>-This look a little crowded </l...
Caylee Anderson’s crime scene <ul><li>This is an outdoor scene in a wooded location that had flooded since the PR had firs...
Caylee <ul><li>This is an example of a wooded crime scene with soft dirt and large amounts of natural artifacts </li></ul>
Caylee <ul><li>The area where the skeletal remains were found is clearly evident. </li></ul>
You decide <ul><li>Here you have an elderly male in bed covered with blood.  The first police officers determined it to be...
You Decide <ul><li>Another view: Lots of blood. </li></ul><ul><li>-What color is the blood?  </li></ul><ul><li>-What can y...
You Decide <ul><li>This is the bathroom: </li></ul><ul><li>-Note the blood drops on the floor </li></ul><ul><li>-There is ...
You Decide <ul><li>This was a natural death.  </li></ul><ul><li>There were no open wounds </li></ul><ul><li>The tissues in...
Upcoming SlideShare
Loading in...5
×

Fs Ch 2

2,159
-1

Published on

Published in: Travel, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
2,159
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
103
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide
  • Upon arrival at a crime scene the first responding police officer to a crime scene is responsible for: Acquiring medical assistance for injured victims Medical personnel avoid disturbing evidence and approach the victim by an indirect route . Detaining any potential suspects or witnesses Statements are taken from victims, witnesses, and suspects. Securing the crime scene to the greatest extent possible The boundary is sealed off, and guards are posted at the entry to the crime scene if needed. All civilians and unauthorized personnel are excluded from the crime scene. Calling for any additional personnel needs such as other officers and/or forensic investigators. The personnel required depends upon the nature of the crime scene.
  • The boundaries of the crime scene must be secured with crime scene tape, ropes, or cones. The secured area should include the area where the crime took place and the surrounding area where physical evidence may be located.
  • Post officers to restrict access secured, guards may be posted to restrict access to the crime scene. A detailed log is kept of personnel movements in and out of the crime scene. This log includes personnel names and time of entry or exit. Investigators should never do anything that might alter the crime scene including smoking, eating, drinking, or littering.
  • The Walkthrough – initial survey of the crime scene Perpetrator’s point of entry and exit are located. Indirect path is taken to the center of the crime scene. Obvious items of evidence are located and documented. The conditions of the scene are observed and recorded. Special attention is paid to item or conditions that suggest timing of the incident or do not appear to belong.
  • Primary Crime Scene --the location at which the initial crime occurred Ex: the house in which a murder occurred Secondary Crime Scene --the location at which events after the initial crime occurred Ex: the shallow grave in which a murder victim was buried Whether a crime scene is primary or secondary may be inferred by the presence or absence of specific evidence.
  • Investigators receive their assigned tasks from the lead investigator. Investigators store their equipment. Investigators meet to discuss aspects of the crime scene. Investigators and law enforcement personnel communicate with personnel at other crime scenes.
  • The search for physical evidence at a crime scene must be thorough and systematic. The search pattern selected will normally depend on the size and locale of the scene and the number of collectors participating in the search. For a factual, unbiased reconstruction of the crime, the investigator, relying upon his or her training and experience, must not overlook any pertinent evidence. Physical evidence can be anything from massive
  • Line/Strip Search Pattern -One or two investigators start at the boundary of the crime scene and search in straight lines across to the other side of the crime scene. Grid Search Pattern -- Two or more investigators form a grid by searching in line patterns that overlap and are perpendicular to each other.
  • Spiral Search Pattern --One investigators searches in a spiral path from the center of the crime scene to the boundary (outward) or from the boundary of the crime scene to the center (inward). Wheel/Ray Search Pattern --Several investigators search in straight lines from the center to the boundary (outward) or from the boundary to the center (inward). Quadrant/Zone Search Pattern --The crime scene is divided into smaller sections (zones). One or more investigators are assigned to search each zone.
  • The experienced lead investigator decides when all pertinent physical evidence has been recorded and collected at the crime scene. A final survey is undertaken to visually review the scene and collect all evidence and equipment. Following the final survey, the crime scene is released to the proper authorities.
  • Fs Ch 2

    1. 1. Chapter 2 Securing and Searching the Crime Scene
    2. 2. Arrival at the Crime Scene <ul><li>First arriving officer: </li></ul><ul><ul><li>Medical assistance for injured victims </li></ul></ul><ul><ul><li>Detain suspects/witnesses </li></ul></ul><ul><ul><li>Secure the crime scene </li></ul></ul><ul><ul><li>Call for any additional personnel </li></ul></ul>
    3. 3. Securing the Crime Scene <ul><li>Establish appropriate boundaries </li></ul><ul><li>Secured area should include actual crime scene and locations of evidence </li></ul>
    4. 4. <ul><li>Post officers to restrict access </li></ul><ul><li>Crime scene log </li></ul><ul><li>Investigators should never alter the crime scene </li></ul>Securing the Crime Scene
    5. 5. <ul><li>Walkthrough (initial survey) </li></ul><ul><li>Points of entry/exit </li></ul><ul><li>Indirect path to the center of the crime scene </li></ul><ul><li>Evidence located and documented. </li></ul><ul><li>Scene conditions observed and recorded. </li></ul>Surveying the Crime Scene
    6. 6. <ul><li>Primary Crime Scene </li></ul><ul><li>-location of initial crime </li></ul><ul><li>Secondary Crime Scene </li></ul><ul><li>-location after the initial crime occurred </li></ul><ul><li>-inferred by the presence or absence of specific evidence. </li></ul>Surveying the Crime Scene
    7. 7. <ul><ul><li>Staging area outside crime scene. </li></ul></ul><ul><ul><li>Lead investigator assigns tasks. </li></ul></ul><ul><ul><li>Equipment stored. </li></ul></ul><ul><ul><li>Investigators discuss aspects of the crime scene. </li></ul></ul><ul><ul><li>Investigators communicate with personnel at other crime scenes. </li></ul></ul><ul><ul><li>Central area of communication. </li></ul></ul>COMMAND CENTER
    8. 8. <ul><li>Thorough and systematic. </li></ul><ul><li>Search pattern depends on the size/locale and the number of collectors </li></ul><ul><li>Do not overlook pertinent evidence. </li></ul><ul><li>Physical evidence: </li></ul><ul><li>-everything </li></ul><ul><li>-anything </li></ul>CRIME SCENE SEARCH
    9. 9. <ul><li>Line/Strip Search Pattern </li></ul><ul><li>-Start at the boundary of the crime scene and search in straight lines across to the other side. </li></ul><ul><li>-Best for outdoor/large areas/large groups </li></ul><ul><li>Grid Search Pattern </li></ul><ul><li>- search area divided into grids </li></ul><ul><li>-best for large areas/plane crashes </li></ul>Searching the Crime Scene
    10. 10. <ul><li>Spiral Search Pattern </li></ul><ul><li>-Boundary inwards in a circular pattern </li></ul><ul><li>Quadrant/Zone Search Pattern </li></ul><ul><li>-Divided into zones </li></ul><ul><li>-Each zone searched/then zones switched </li></ul><ul><li>-Best for indoors/smaller areas </li></ul>Searching the Crime Scene
    11. 11. <ul><li>Lead investigator: </li></ul><ul><li>-decides when all evidence is recorded/collected </li></ul><ul><li>Final survey: </li></ul><ul><li>-review the scene/collect all evidence and equipment. </li></ul><ul><li>-scene released to the proper authorities </li></ul>Departing the Crime Scene
    12. 12. Crime scene <ul><li>Examine this scene closely: </li></ul><ul><li>-wheelchair </li></ul><ul><li>-signs of forced entry? </li></ul><ul><li>-blood? </li></ul><ul><li>-your initial conclusions? </li></ul>
    13. 13. Securing the crime scene <ul><li>Actual crime scene </li></ul><ul><li>Enthusiasm can be dangerous! </li></ul><ul><li>-note the crime scene tape around the upper floors </li></ul><ul><li>-Rookies! </li></ul>
    14. 14. Crime scene <ul><li>How many people should you let into the crime scene? </li></ul><ul><li>-This look a little crowded </li></ul><ul><li>-No coordination of tasks </li></ul><ul><li>-Milling about approach to crime scene </li></ul>
    15. 15. Caylee Anderson’s crime scene <ul><li>This is an outdoor scene in a wooded location that had flooded since the PR had first called 911. </li></ul><ul><li>-aerial view </li></ul>
    16. 16. Caylee <ul><li>This is an example of a wooded crime scene with soft dirt and large amounts of natural artifacts </li></ul>
    17. 17. Caylee <ul><li>The area where the skeletal remains were found is clearly evident. </li></ul>
    18. 18. You decide <ul><li>Here you have an elderly male in bed covered with blood. The first police officers determined it to be suspicious. </li></ul><ul><li>What do you think? </li></ul><ul><li>What do you see in the picture? </li></ul><ul><li>See the blood? </li></ul><ul><li>See the tissues on the nightstand? </li></ul><ul><li>Never assume!!! </li></ul>
    19. 19. You Decide <ul><li>Another view: Lots of blood. </li></ul><ul><li>-What color is the blood? </li></ul><ul><li>-What can you determine from this color? </li></ul><ul><li>-What does the pooling of the blood tell you? </li></ul>
    20. 20. You Decide <ul><li>This is the bathroom: </li></ul><ul><li>-Note the blood drops on the floor </li></ul><ul><li>-There is blood on the toilet </li></ul><ul><li>-More tissues on the bureau </li></ul><ul><li>Give up? </li></ul>
    21. 21. You Decide <ul><li>This was a natural death. </li></ul><ul><li>There were no open wounds </li></ul><ul><li>The tissues indicated the decedent had tried to control the bleeding </li></ul><ul><li>The color of the blood and the smell in the residence (you can’t smell it of course) were indicators of an upper gastrointestinal (GI) bleed. </li></ul><ul><li>A GI bleed is when someone is bleeding internally and eventually the blood gets thrown up and it can be very messy and appear like a homicide. </li></ul>
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×