What is crime scene contamination and what role does it play in the processing of a crime scene?

What is the importance of crime scene processing?

Documentation, collection, and preservation of evidence are crucial steps in criminal investigation and often provide the basis for effective identification, documentation, prosecution, and conviction of perpetrators.

What is contamination in forensic science?

1.1. 1 For the purposes of this guidance, contamination is defined as ‘the introduction of DNA, or biological material containing DNA, to an exhibit at or after the point when a controlled forensic process starts‘.

What does processing a crime scene involve?

“Processing a crime scene” is a long, tedious process that involves purposeful documentation of the conditions at the scene and the collection of any physical evidence that could possibly illuminate what happened and point to who did it. … The ultimate goal is the conviction of the perpetrator of the crime.

What a crime scene unit does at a crime scene?

A forensic crime scene unit consists of crime scene investigators who document an active crime or accident scene and collect, classify and identify evidence that’s later analyzed in a lab.

What does the term contamination mean?

the act of contaminating, or of making something impure or unsuitable by contact with something unclean, bad, etc. the act of contaminating, or of rendering something harmful or unusable by the addition of radioactive material: the contamination of food following a nuclear attack.

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How do you contaminate a crime scene?

Environmental conditions may also play a major role in the contamination of crime scene evidence. Wind, sun, rain, snow and temperature can play key roles in the destruction of the evidence at a crime scene.

How does contamination of evidence occur?

The first is during the investigation of a scene, and the second is during laboratory analysis. Contamination of an exhibit can occur in several ways, for example directly from an individual, from the gloves of an individual, from contaminated equipment or consumables, or from one exhibit to another.

What are the 5 parts to processing a crime scene and who performs them?

Terms in this set (5)

  • Interview witnesses/ people involved to establish the theory of the case. …
  • Examine the scene using a systematic search method. …
  • Sketch the scene to create an overall diagram. …
  • Photograph the scene, the evidence, the body to get detailed pictures of what everything looked like at that moment.

Who usually performs the first step in processing a crime scene?

Interview is the first step in processing a crime scene. The crime scene technician must interview the first officer at the scene or the victim to ascertain the “theory” of the case. Basically what allegedly happened, what crime took place, and how was the crime committed.

What are the function of Scene of crime Operation?

Scene of the Crime Operation (SOCO) – A forensic procedure performed by the trained personnel of the PNP Crime Laboratory SOCO Team through scientific methods of investigation for the purpose of preserving the crime scene, gathering information, documentation, collection, and examination of all physical and other

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