Blood Spatter Analysis Test Guide| Questions
with 100% Correct Answers
Cast-off Spatter - Answer Created when a blood-covered object flings blood in an arc
onto a nearby surface.
The width of the cast-off pattern may help suggest the object that produced it.
May also suggest whether the blow that caused the pattern was directed from right to
left or left to right.
Direction: backward = opposite the direction of the blow.
May also show the minimum number of blows delivered to a victim.
Factors Affecting the Shape of the Droplet - Answer The volume of the blood droplet,
the texture of the target surface, angle of the impact, the velocity at which the blood
droplet left its source, and the height of the fall.
Volume of Blood Droplet - Answer Bigger droplets create bigger bloodstains.
Harder and Nonporous Surfaces - Answer (e.g., glass or smooth tiles)
Result in less spatter
Rough Surfaces - Answer (e.g., concrete floor or wood)
, Result in irregularly shaped stains with serrated edges, possibly with satellite stain (a
smaller bloodstain that originated during the formation of the parent stain as a result of
blood impacting a surface).
Velocity of the Droplet - Answer The higher the velocity of the force of the impact on
the source of blood, the higher the velocity of the blood droplets.
As the force and velocity of impact increase, the diameter of the resulting blood drops
decreases.
Very difficult to determine exact velocity.
Height of the Fall - Answer The higher the distance, the larger the diameter.
Maximum diameter is at 7 feet (due to air resistance).
Challenges and Limitations - Answer Contamination of the crime scene can distort
bloodstain patterns.
Environmental factors such as airflow or temperature can affect blood spatter.
Interpretation may vary depending on the expertise of the analyst.
Blood Spatter Analysis - Answer A forensic technique used to determine various aspects
of a crime scene by analyzing the patterns of bloodstains.
Blood - Answer Always equated to violence.
with 100% Correct Answers
Cast-off Spatter - Answer Created when a blood-covered object flings blood in an arc
onto a nearby surface.
The width of the cast-off pattern may help suggest the object that produced it.
May also suggest whether the blow that caused the pattern was directed from right to
left or left to right.
Direction: backward = opposite the direction of the blow.
May also show the minimum number of blows delivered to a victim.
Factors Affecting the Shape of the Droplet - Answer The volume of the blood droplet,
the texture of the target surface, angle of the impact, the velocity at which the blood
droplet left its source, and the height of the fall.
Volume of Blood Droplet - Answer Bigger droplets create bigger bloodstains.
Harder and Nonporous Surfaces - Answer (e.g., glass or smooth tiles)
Result in less spatter
Rough Surfaces - Answer (e.g., concrete floor or wood)
, Result in irregularly shaped stains with serrated edges, possibly with satellite stain (a
smaller bloodstain that originated during the formation of the parent stain as a result of
blood impacting a surface).
Velocity of the Droplet - Answer The higher the velocity of the force of the impact on
the source of blood, the higher the velocity of the blood droplets.
As the force and velocity of impact increase, the diameter of the resulting blood drops
decreases.
Very difficult to determine exact velocity.
Height of the Fall - Answer The higher the distance, the larger the diameter.
Maximum diameter is at 7 feet (due to air resistance).
Challenges and Limitations - Answer Contamination of the crime scene can distort
bloodstain patterns.
Environmental factors such as airflow or temperature can affect blood spatter.
Interpretation may vary depending on the expertise of the analyst.
Blood Spatter Analysis - Answer A forensic technique used to determine various aspects
of a crime scene by analyzing the patterns of bloodstains.
Blood - Answer Always equated to violence.
