FIS 201 BLOODSTAIN PATTERNS AND ANALYSIS WITH
ALL CORRECT & VERIFIED ANSWERS (UPDATED TO
PASS)
Using the formal definition, what does the image below depict? Correct answer-Bloodstain Pattern
For a quantity of blood in the air, [A] created by the mutual attraction of blood cells holds the blood
together. [B] resists flow, causing the blood to slosh slowly rather than run. Once it strikes a surface,
these two forces are balanced by the [C] imparted by the speed of travel at impact. Correct
answer-[A]=[surface tension]
[B]=[viscosity]
[C]=[kinetic energy]
Place the four stages of blood drop collapse in order. Correct answer-1. Contact
2. Displacement
3. Dispersion
4. Retraction
Observe the image below. What phase of impact is depicted? (Hint: Look carefully and evaluate for
spines. vs. dimples) Correct answer-Dispersion
When analyzing bloodstains, analysts first determine the [A] by examining the narrow end of
elongated blood stains, and the [B] by evaluating the relationship between the length and width of
an individual stain. The [C] is then determined by noting where the paths of travel of several blood
stains converge. Finally, by integrating impact and travel information, the [D] can be located in three
dimensional space. Correct answer-[A]=[direction of travel]
[B]=[angle of impact]
[C]=[area of convergence]
[D]=[area of origin]
What type of projected stain is depicted in the image below? Correct answer-Impact spatter
What is the major bloodstain pattern depicted in the photo below? For orientation, you are looking
at the upper portion of a wall where it meets the ceiling. (If you have trouble seeing, you can open
the image in a new tab for a 4000x6000 image) Correct answer-Cast off
Towards what direction was the indicated stain traveling? Correct answer-Towards the lower right
In the image below, please indicate the area of convergence, assuming all blood stains originated
from a single impact. Correct answer-(selection)
Coordinates: 431, 335
In the stain above, the stain measures 7mm x 18mm. How would you calculate its angle of impact?
Correct answer-sin-1 7/18
The area of origin is always oriented in a straight line 90° from the area of convergence. Correct
answer-True
What time information does a skeletonized wipe tell us versus a plain wipe? Correct answer-A
skeletonized wipe sat for a bit; a plain wipe was disturbed almost immediately after it was deposited
ALL CORRECT & VERIFIED ANSWERS (UPDATED TO
PASS)
Using the formal definition, what does the image below depict? Correct answer-Bloodstain Pattern
For a quantity of blood in the air, [A] created by the mutual attraction of blood cells holds the blood
together. [B] resists flow, causing the blood to slosh slowly rather than run. Once it strikes a surface,
these two forces are balanced by the [C] imparted by the speed of travel at impact. Correct
answer-[A]=[surface tension]
[B]=[viscosity]
[C]=[kinetic energy]
Place the four stages of blood drop collapse in order. Correct answer-1. Contact
2. Displacement
3. Dispersion
4. Retraction
Observe the image below. What phase of impact is depicted? (Hint: Look carefully and evaluate for
spines. vs. dimples) Correct answer-Dispersion
When analyzing bloodstains, analysts first determine the [A] by examining the narrow end of
elongated blood stains, and the [B] by evaluating the relationship between the length and width of
an individual stain. The [C] is then determined by noting where the paths of travel of several blood
stains converge. Finally, by integrating impact and travel information, the [D] can be located in three
dimensional space. Correct answer-[A]=[direction of travel]
[B]=[angle of impact]
[C]=[area of convergence]
[D]=[area of origin]
What type of projected stain is depicted in the image below? Correct answer-Impact spatter
What is the major bloodstain pattern depicted in the photo below? For orientation, you are looking
at the upper portion of a wall where it meets the ceiling. (If you have trouble seeing, you can open
the image in a new tab for a 4000x6000 image) Correct answer-Cast off
Towards what direction was the indicated stain traveling? Correct answer-Towards the lower right
In the image below, please indicate the area of convergence, assuming all blood stains originated
from a single impact. Correct answer-(selection)
Coordinates: 431, 335
In the stain above, the stain measures 7mm x 18mm. How would you calculate its angle of impact?
Correct answer-sin-1 7/18
The area of origin is always oriented in a straight line 90° from the area of convergence. Correct
answer-True
What time information does a skeletonized wipe tell us versus a plain wipe? Correct answer-A
skeletonized wipe sat for a bit; a plain wipe was disturbed almost immediately after it was deposited
