Download Unit #5 – Bloodstain Pattern Analysis Forensic Science 1 Bloodstain

Unit #5 – Bloodstain Pattern Analysis
Forensic Science
Bloodstain Pattern Analysis Review
Review #5
1) Define bloodstain pattern analysis.
2) Define cohesive and disruptive forces AND provide examples of each.
3) How did forensic investigators previously view how blood droplets interact with a target
surface?
4) What is the current understanding of droplets interact with a target surface AND how do
know this?
5) List the five mechanisms of blood pattern types.
6) How long does it take for a droplet to achieve a spherical shape?
7) List the four impact phases of a droplet.
8) What is the motion of the blood droplet in the first phase?
1
Unit #5 – Bloodstain Pattern Analysis
Forensic Science
9) What is the main structure formed in this phase?
10) What is the motion of the blood droplet in the second phase?
11) Define protuberances, spikes/spines, and satellites.
12) What is the motion of the droplet in phase 2?
13) How does terminal velocity affect phase 2?
14) Do surface textures cause a blood droplet to burst?
15) What is the motion of a blood droplet in phase 3?
16) How is the volume of the stain and its stability in its structure related? Why does this
relationship exist?
17) Is surface tension still a major force in phase 3?
2
Unit #5 – Bloodstain Pattern Analysis
Forensic Science
18) What is the motion of the droplet in phase 4?
19) What are the two possible outcomes in this phase?
20) What happens to the blood stain once the blood begins to coalesce?
21) Discuss angle of impact, area of convergence, and point of origin and how they relate to
bloodstain pattern analysis.
22) What are the two major classifications of blood spatter?
3
Unit #5 – Bloodstain Pattern Analysis
Forensic Science
23) Review worksheet #4.4 to go over defining traits (diameter, velocity) of the spatters in
the previous question.
24) Give examples of the different velocity spatters.
25) Define coronal effect.
26) Illustrate and define the spatters associated with high force impact spatter.
27) Define passive spatter and impact spatter.
28) List the types of passive spatter.
29) List the types of impact spatter.
30) What is the difference between physically altered stains and those who undergo
physiologically altered?
4