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Blood Spatter

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Question
Answer
Types of blood stain patterns   blood drops, impact patterns, transfer patterns, and smears and motion patterns  
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What can you learn from bloodstain patterns?   angle of deposit, distance from target, direction of travel, trails, object that caused the pattern, time since deposit, and volume of blood  
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What are factors affecting bloodstain patterns?   Energy (low, medium, high), distance, target surface, and angle of deposit.  
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Low-velocity pattern   happens when an object moving less than 5 ft/sec strikes a surface, with drops that are 4mm or larger in size  
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Arterial bleeding   If an artery is damaged during an assault, suicide attempt or accident, the blood loss may take the form of gushes or spurts  
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Cast-off blood   blood that is flung from and object, tends to be fairly uniform trail of droplets  
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Medium-velocity spatter   come from objects moving between 5-100 ft/sec. Vary from 1-4 mm in diameter  
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High-velocity spatter   occur when an object strikes a victim at a speed faster than 100 ft/sec, the spatters are very small, less than 1 mm in diameter  
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Area of convergence   represents the point from which stain emanated  
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Void pattern   an absence of blood spatter in an area where you would otherwise expect to see them  
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Transfer pattern   result when an object soaked with blood comes in contact with an unstained object  
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Wipe   pattern created when a secondary target moves through an existing wet blood stain on some other object  
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Swipe   the transfer of blood onto a target surface by a bloody object that is usually moving laterally  
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Created by: TBrylewski
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