When a violent crime occurs, blood evidence is found at the crime scene. Bloodstain pattern analysis is a subfield in forensic science that utilizes blood evidence to reach a conclusion about a crime. The shape and convergence of bloodstains can infer the murder weapon and origin of attack, which is crucial when reviewing witness statements. However, analyst error sometimes results in inaccurate conclusions. This review will focus on how blood is detected and classified and include certain factors that may affect blood appearance.
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How Bloodstain Pattern Analysis Works | HowStuffWorks
This session provides participants with an understanding of bloodstain pattern analysis and how the study of the size, shape, and location of bloodstains can be used to determine the physical events that gave rise to their origin. See Activity 6 for suggestions of speakers who could attend the meeting or places where participants could visit, and make arrangements as needed. These videos were chosen because they illustrate important aspects of the forensic science discipline being studied in this session. Note: Some of the content in the case studies is geared toward a mature audience.
How Bloodstain Pattern Analysis Works
The trails of blood in a crime scene or castoff blood patterns are reasonably straightforward and understandable. Determining areas of convergence and origin employing string methods or trigonometric methodologies are more complex and call for a trained specialist. The scientific analysis of bloodstain patterns requires extensive training and experience, which goes beyond the normal crime scene process. Furthermore, there are a number of different definitions and opinions by various experts in the field, which tend to confuse the average investigator. Therefore, the author's intention within this article is to illustrate some simple and practical examples of bloodstain pattern recognition and documentation along with photos and description.
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