Crime Scene Processing
Processing a Scene Objectives
Safety first
Secure the Scene
Maintain protection of the scene
Photograph documentation
Make a sketch
Take notes
Collect, label, and package evidence
Write the report
Safety First
Each scene is unique so be attentive and keep your own safety in mind.
Obvious things such as glass and sharp objects, but there can also be trip hazards and unstable objects.
Secure The Crime Scene
The first officer at the crime scene is responsible for securing and protecting the area using crime scene tape or other physical barriers.
*If victim is alive medics should be called.
Goal is to not compromise the evidence in any way.
If witnesses are present make sure they do not leave the scene.
Protect The Scene
This is very important!
Anyone who enters the scene has the potential to destroy physical evidence.
Often damage may be unintentional
Everyone should be excluded from the scene, including police officers not directly involved in processing the site or investigation.
Crime Scene Investigator
Has only a limited amount of time to work and must complete the following for the crime scene…
Photograph
Sketch
Make notes
Collect, document, and package evidence
Photograph of Unaltered Scene
Objects must remain untouched until photographed
If evidence has been removed or moved, it must be mentioned in the report
Any proof that the crime scene was compromised would cause the evidence to not be admissible in court
Crime Scene Photography Basics
Investigators should be thorough taking care to photograph all areas where the crime took place and likely entry and exit points.
Remember to include different angles
It is important to have establishing, medium-range, close-up and macroscopic photographs.
All images should include a ruler as a size reference to help establish the size of objects.
Crime Scene Sketch Basics
After photographs a sketch the crime scene should be generated
On scene a rough sketch will be made
After leaving the scene part of the processing phase a finished or final sketch that has precise recreation of the scene.
Remember all sketches…
Have a legend showing where certain items are at the crime scene
Indicate where North is
Sketch Requirements
Title
Legend of any abbreviations and symbols used
Compass direction (showing at least North)
Scale
Documentation with at least location, date and time, creators name
Notes Should Include
Location of the scene
Date and time of notification and information received and who it was from
Time of your arrival and departure
Scene details
More on next slide
Description of the victim
Names of the investigation team
Detailed Description of the Scene
This is of particular importance for physical evidence items at the scene
For each item the following should be documented…
Time of discovery
Who discovered it
How it was packaged and labeled
Description of item
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