What are the four steps used to analyze a crime scene in order?

What are the 4 steps to analyze a crime scene?

What are the 4 steps to analyze a crime scene?

  • Approach the Scene.
  • Secure and Protect the Scene.
  • Initiate Preliminary Survey.
  • Evaluate Physical Evidence Possibilities.
  • Prepare a Narrative of the Scene.
  • Capture the Scene Photographically.
  • Prepare the Crime Scene Sketch.
  • Conduct a Detailed Search.

What are the first four steps in blood analysis at a crime scene?

Bloodstain analysts use established scientific methods to examine bloodstain evidence at a crime scene including information gathering, observation, documentation, analysis, evaluation, conclusion and technical (or peer) review.

What are the steps in crime scene processing?

7 Steps of a Crime Scene Investigation

  • Identify Scene Dimensions. Locate the focal point of the scene. …
  • Establish Security. Tape around the perimeter. …
  • Create a Plan & Communicate. Determine the type of crime that occurred. …
  • Conduct Primary Survey. …
  • Document and Process Scene. …
  • Conduct Secondary Survey. …
  • Record and Preserve Evidence.
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What are the 5 components of a crime scene?

The basic crime scene procedures are physical evidence recognition, documentation, proper collection, packaging, preser- vation, and, finally, scene reconstruction.

What is the first step in analyzing a crime scene?

A crime scene investigator’s first step is to talk to the initial officers on scene. Their observations can affect how the walk-through of the scene is conducted by CSI, what is included in a search warrant application, and even what equipment (like OSCR360) and/or additional personnel are needed.

Which team is usually the first to appear at a crime scene?

Police officers are typically the first to arrive at a crime scene.

What is a small amount of evidence called?

Fingerprints. Physical evidence that is found at a crime scene in small, but measurable amounts. Trace. Evidence found at a crime scene in the form of a physical object.

What are the six types of blood spatter patterns?

Terms in this set (35)

  • Angle of impact. The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.
  • Arterial Spurting (or gushing) pattern. …
  • Back Spatter. …
  • Blood Spatter Analysis. …
  • Bloodstain. …
  • Cast-off pattern. …
  • Contact stain. …
  • Direction of flight.

What are the 5 steps in crime scene investigation?


What are 4 different types of crime scenes?

Different types of crime scenes include outdoors, indoor, and conveyance. Outdoor crime scenes are the most difficult to investigate. The exposure to elements such as rain, wind, or heat, as well as animal activity, contaminates the crime scene and leads to the destruction of evidence.

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What is the first thing you do at a crime scene?

Photograph and document the scene. Collect trace materials (especially from probable points of entry) Collect low-level DNA evidence by swabbing areas of likely contact. Collect other items that may contain biological evidence.

What should be photographed first?

The object should first be photographed as is, then photographed with the ruler. It is important that when doing one-to-one photography that the ruler is on the same plane as the object being photographed and the film plane is parallel to the ruler. This is why a level and a tripod are necessary.

What are the three phases of criminal investigation?

Applied to the criminal realm, a criminal investigation refers to the process of collecting information (or evidence) about a crime in order to: (1) determine if a crime has been committed; (2) identify the perpetrator; (3) apprehend the perpetrator; and (4) provide evidence to support a conviction in court.

What are the steps in collecting evidence?

Trace Evidence

  1. Document and photograph the evidence.
  2. Properly secure the evidence by placing it in a paper bag or envelope.
  3. Close, seal, or tape the paper bag or envelope. …
  4. Label the bag or envelope with the patient’s identifying information.
  5. Examiner must place signature, date, and time on the envelope[3]
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