Gold Award: Crime Scene Investigation: What it takes to be a Forensic Scientist

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Bloodstain

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Bloodstain Pattern Analysis: is the examination of the shapes, locations, and distribution patterns of bloodstains, in order to provide an interpretation of the physical events which gave rise to their origin.

BPA (Bloodstain Pattern Analysis) may on many occasions, clearly define the location of the victim or the assailant(s) by establishing the actions of either or both. Possible and impossible scenarios may be established to determine if the victim/witness/assailant is accurately describing what took place.

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Bloodstain Pattern Analysis involves examination of the sizes, shapes and pattern distribution of bloodstains at crime scenes and from this a possible reconstruction of the chain of events.

Violent crimes often result in bloodshed, which may leave bloodstains at the scene as well as on clothing, weapons or other objects. An expert in the bloodstain field can provide valuable insight into the events that occurred at a crime scene. The position and movements of the victim at the time of the bloodletting can usually be determined.

Bloodstains on clothing can help determine the position of the person who was wearing that clothing at the time of bloodshed. Sometimes a complete reconstruction of the crime is possible. Bloodstain evidence can also refute or support statements given to police by witnesses or the accused.

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To see a great wealth of information on Bloodstains go to any of the following websites:
 
  contains information about differnt splatter types.
 
  The homepage of the International Association of Bloodstain Pattern Analysts.  The IABPA is an organization of forensic experts specializing in the field of bloodstain pattern analysis. 
 
  The Marks Working Group  is one of the technical Working Groups of the European Network of Forensic Science Institutes (ENFSI) and represents examiners working with shoeprint, toolmark, and other types of visual mark comparisons in forensic laboratories.
 
 
 
 
 
  

  • What type of weapon or impact occurred to cause the bloodstains present?
  • How many times was the victim struck ?
  • Where was the victim(s) at the time the injuries were inflicted?
  • Where was the assailant(s) during and following the assault?
  • Is the bloodstain evidence consistent with the medical examiner findings?
  • Is the bloodstain evidence on the suspect and his clothing consistent with the crime scene?

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