Questions and Answers
What is the angle of impact?
What does the area of convergence refer to?
The space/size of the splatter
What is the area of origin?
The location in three-dimensional space where blood originated from
What does arterial spray indicate?
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What is back spatter?
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What is cast-off?
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What is the purpose of crime-scene reconstruction?
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What is a drip trail pattern?
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What does an expirated blood pattern indicate?
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What are flows in bloodstain patterns?
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What is forward spatter?
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High-velocity splatter is usually larger than low-velocity splatter.
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What does impact splatter refer to?
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What defines low-velocity spatter?
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What is satellite spatter?
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What is skeletonization in bloodstains?
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What is a transfer pattern?
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What does the term void mean in forensics?
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Study Notes
Bloodstain Pattern Analysis Terms
- Angle of Impact: Refers to measuring the degree of circular distortion from blood splatter to determine the angle at which blood impacted a surface.
- Area of Convergence: Describes the space or size of blood splatter patterns, indicating where multiple blood droplets originated.
- Area of Origin: The three-dimensional location from which a bloodstain originated, determined by calculating the area of convergence and angles of impact for bloodstains.
- Aterial Spray: Blood flow from a severely damaged major blood vessel, typically characterized by high-pressure ejection creating a spray pattern.
- Back Spatter: Blood that is propelled toward the source of force, often seen in shooting incidents where blood travels opposite the direction of force applied.
- Cast-off: A pattern of bloodstains resulting from blood being flung from a moving, blood-bearing object onto a surface, indicative of motion.
- Crime Scene Reconstruction: The process of documenting conditions and reconstructing events to understand the sequence of actions during a crime.
- Drip Trail Pattern: Bloodstain patterns formed from blood dripping off a moving person or object, creating a recognizable pathway separate from other blood patterns.
- Expirated Blood Pattern: Blood expelled from the body (nose, mouth, or respiratory system) due to airflow or pressure, resulting in a distinct pattern.
- Flows: Continuous blood trails created as blood is pulled downward by gravity, often indicating the position or movement of a victim or object.
- Forward Spatter: Blood that moves in the same direction as the force that caused the spatter, typically observed in blunt force or gunshot incidents.
- High-Velocity Splatter: Characterized by smaller droplets, typically created by forces exceeding about 100 ft/sec, such as gunshots or explosions.
- Impact Splatter: Random blood splatter patterns resulting from a blood-bearing object receiving impact, indicating a violent event.
- Low-Velocity Spatter: Typically results from low-speed impact, characterized by larger droplets (4 to 6 mm), with velocities up to approximately 5 ft/sec.
- Satellite Spatter: Small droplets that detach from a main droplet upon impact with a surface, forming a distinctive spray around the parent stain.
- Skeletonization: A process where the edges of a bloodstain dry to the surface over time, leaving a mark even after the main droplet is disturbed, useful for assessing how long a bloodstain has been present.
- Transfer Pattern: Blood patterns formed when a wet, bloody surface contacts another surface, often revealing a recognizable image of the originating source.
- Void: An empty space or absence of bloodstains, indicating potential positioning of a person or object during the event that caused bloodshed.
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Description
Test your knowledge on key forensics terminology with these flashcards. The quiz covers important definitions such as angle of impact, area of convergence, and area of origin, essential for understanding bloodstain pattern analysis.