Exam (elaborations)
BLOOD SPATTER ANALYSIS QUESTIONS AND ANSWERS | UPDATED 2024/25 RATED
- Course
- Institution
BLOOD SPATTER ANALYSIS QUESTIONS AND ANSWERS | UPDATED 2024/25 RATED
[Show more]
Content preview
BLOOD SPATTER ANALYSISQUESTIONS AND ANSWERS | UPDATED
2024/25 RATED
blood spatter analysis was adopted in practical manner in US after what court case? -
II II II II II II II II II II II II II II II II II
1954 Sheppard case
II II II
blood spatter analysis can provide what information? - -who shed blood?
II II II II II II II II II II II II II II
-how did it get where it was found?
II II II II II II II
-what was the sequence of events that led to this pattern?
II II II II II II II II II II
-origin of blood stain II II II
-type of instrument causing stain
II II II II
-direction from which it struck victim II II II II II
-relative position of victim/assailant II II II
-# of blows/gun shots
II II II
-truthfulness of suspects/witnesses II II
II what is blood held together by? - surface tension
II II II II II II II II II II II
surface tension - cohesive forces that produce a surface resistant to penetration or
II II II II II II II II II II II II II II II II
separation
II
before a drop of blood can fall, what needs to happen? - gravitational attraction for the
II II II II II II II II II II II II II II II II II II II
drop must exceed surface tension
II II II II II
*surface tension is broken w/ energy II II II II II
shape and size of blood drop depends on what four factors? - size of drop
II II II II II II II II II II II II II II II II II II
velocity
angle
type of surface hit
II II II
how fast does a drop of blood fall? - increases speed as it falls until it hits terminal
II II II II II II II II II II II II II II II II II II II II II
velocity (25 ft/ second)
II II II II
when a drop of blood strikes at a right angle, spatter pattern forms what shape? - even
II II II II II II II II II II II II II II II II II II II II
circle around point of impact
II II II II II
when a drop of blood strikes at a smaller angle than 90 degrees, what shape does it
II II II II II II II II II II II II II II II II II
create? - oval pattern w/ narrow/pointed end aiming in direction of travel
II II II II II II II II II II II II II II II
these surfaces create small patterns of blood spatter - smooth surfaces like glass, tile,
II II II II II II II II II II II II II II II II II
and marble
II II
, when a drop of blood falls onto a hard surface, what can happen to the drops? - small
II II II II II II II II II II II II II II II II II II II II II
secondary/satellite droplet may surround initial circular stain
II II II II II II II
with drops that hit smooth surfaces at less than 90 degrees- secondary stains are
II II II II II II II II II II II II II II
elongated but tails of satellite droplets point which direction? - point where they came
II II II II II II II II II II II II II II II II II
from (NOT direction they are traveling)
II II II II II II
spatters can be produced by what mechanisms? - stabbings
II II II II II II II II II II II II
beatings
gunshots
arterial bleeds II
cast-off blood II
splashing
expirated blood II
II impact angle - slant at which blood drops strike surface
II II II II II II II II II II II II
II directionality - course the blood drop followed II II II II II II II II II
II how is impact angle determined? - using blood stain's width to length ratio
II II II II II II II II II II II II II II II
what is directionality used for? - used to make point of convergence and point of origin
II II II II II II II II II II II II II II II II II II II
determinations
II
point of convergence - 2d representation of the point where lines tracking the pathways
II II II II II II II II II II II II II II II II II
of 2 or more spatters meet
II II II II II II
at the scene, strings are attached from each stain according to direction of impact...where
II II II II II II II II II II II II II II
strings meet equal the - point of convergence
II II II II II II II II II II II
point of origin - 3d representation of the point where lines tracking, not only the
II II II II II II II II II II II II II II II II II II
pathways, but also angles of impact of 2 or more spatters meet
II II II II II II II II II II II II
II what does the point of origin indicate? - general spatial location of blood source
II II II II II II II II II II II II II II II II
void pattern - absence of blood spatter in area you'd otherwise expect it
II II II II II II II II II II II II II II II II
*could show where attacker was standing b/c body prevents blood from spattering behind
II II II II II II II II II II II II
it
II
you can classify projected spatter two different ways: - type of spatter
II II II II II II II II II II II II II II II
by velocity
II
*both are useful due to overlapping in many areas
II II II II II II II II
impact spatters occur in what type of situation? - beatings
II II II II II II II II II II II II II
stabbings
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller STUVATE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81989 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now