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These are the main points covered under Unit 1.
Steps to Processing the Crime ScenePneumonic Device | PPPSCRIPT | 1st P | Preserve Life (provide medical aid if needed) | 2nd P | Protect the scene (close off the crime scene) | 3rd P | Photograph the scene | S | Search the scene | C | Collect evidence | R | Record (write down important info) | I | Identify (do a quick scan of the evidence) | P | Package the evidence in the appropriate container | T | Transfer evidence collected to the crime lab |
Lawful SearchesTo conduct a LEGAL search, officers must have at least 1 of the following: | Probable cause, consent, or a warrant | Probable Cause | A reason to suspect that a person has committed a crime | Consent | Permission from the person or property owner | Search Warrant | a legal document authorizing a police officer or other official to enter and search premises. |
| | Crime Scene SearchesDo not dismiss any evidence until you figure out whether it is relevant or not | Crime scenes should be searched methodically (with a plan, not randomly) | Which should be searched first: outdoor or indoor crime scenes? | Outdoor (weather may alter evidence and it is harder to protect) | Inward Spiral pattern | Starts at the perimeter of the scene and works toward the center. Good to use when there is only 1 CSI at the scene | Outward Spiral pattern | Start at the center, work your way out | Parallel or Line pattern | All members of the CSI team form a line and walk from one end of the crime scene to the other. Good for large open spaces like a field. | Grid search pattern | Is 2 parallel searches offset by 90°. Good if a more thorough search is needed | Zone or Quadrant | CSIs divide up into groups and each search their section. Example in a house someone would search the living room, someone else searches the bathroom & bedrooms. |
| | Crime Scene SketchesRough Crime Scene Sketch | Quickly done by a CSI member at the scene. The focus is on getting the layout/location/measurements of evidence at the scene down correctly. Artistic design is not important at the moment. | Final Crime Scene Sketch | Is a refined version of the rough crime scene sketch, usually done on the computer or on nice paper. Design is more important here, as this will usually be presented in court. | Reference Points | Fixed, unmoveable points in the crime scene that help us determine the location of our evidence. |
Rough vs. Finished Crime Scene Sketch
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