Question 1

An investigator is faced with clustered and irregularly colored bloodstain patterns at a crime scene that he believes could have originated from an arterial or oral injury.What characteristics of arterial and expirated blood patterns can assist the investigator in differentiating these patterns from other pattern types and each other?

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Question 2

Define the terms area of convergence and area of origin and explain what each reveals to an investigator.

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Question 3

Crime scene ________ is the method used to support a likely sequence of events at a crime scene by observing and evaluating physical evidence and statements made by individuals involved with the incident.

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Question 4

If the distribution and pattern of bloodstains at a crime scene are not properly documented and analyzed,what potential information could be missed?

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Question 5

What determines the size of blood drops in a cast-off pattern?
 Explain.

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Question 6

Name and describe two methods for documenting bloodstain patterns.

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Question 7

Match the word in Column 1 to its definition in Column 2.Each answer can only be used once.
A)The process by which the edges of a stain will dry to the surface in a specific period of time (dependent upon environmental and surface conditions)and will remain apparent even after the rest of the bloodstain has been disturbed from its original position
B)An impact spatter pattern created by a force traveling at 5 ft/sec or less and producing droplets with diameters greater than 3 mm
C)A bloodstain pattern formed by the movement of small or large amounts of blood due to gravity's pull
D)A bloodstain pattern produced when an object makes forceful contact with a source of blood, projecting droplets of blood outward from the source
E)Blood directed back towards the source of the force that caused the spatter
F)An area within a deposited spatter pattern that is clear of spatter, caused by an object or person blocking the area at the time of the pattern's deposition
G)Small droplets of blood that are distributed around the perimeter of a drop or pool of blood that were produced as a result of the blood impacting the target surface
H)Blood which travels away from the source in the same direction as the force which caused the spatter
I)The area on a two-dimensional plane where lines traced through the long axis of several individual bloodstains meet.This approximates the two-dimensional place where the bloodstains were projected from
J)A characteristic bloodstain pattern containing spurts that results from blood exiting under pressure from an arterial injury
K)An impact spatter pattern created by a force traveling at 100 ft/sec or faster and producing droplets with diameters less than 1 mm
L)An impact spatter pattern created by a force traveling at 5-25 ft/sec and producing droplets with diameters between 1 mm and 3 mm
M)The acute angle formed between the path of a blood drop and the surface which it contacts
N)A pattern of bloodstains formed by the dripping of blood off a moving surface or person in a recognizable pathway separate from other patterns
O)Blood that is expelled out of the nose, mouth, or respiratory system as a result of air pressure and/or air flow
P)The location in three-dimensional space that blood that produced a bloodstain originated from.The location of the area of convergence and the angle of impact for each bloodstain is used to approximate this area.
Q)A bloodstain pattern created when a surface that carries wet blood comes in contact with a second surface.Recognizable imprints of all or a portion of the original surface or the direction of movement may be observed.
R)A bloodstain pattern that is created when blood is flung from a blood-bearing object in motion onto a surface
1)Angle of impact
2)Area of convergence
3)Area of origin
4)Arterial spray
5)Back spatter
6)Cast-off
7)Expirated blood pattern
8)Flow pattern
9)Forward spatter
10)High-velocity spatter
11)Impact spatter
12)Low-velocity spatter
13)Medium-velocity spatter
14)Satellite spatter
15)Skeletonization
16)Drip trail pattern
17)Transfer pattern
18)Void

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Question 8

What conclusion can be deduced if fine droplets of the victim's blood are found inside the muzzle of a firearm at an outdoor crime scene,where the victim suffered several gunshot wounds?

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Question 9

Name two major limitations of crime scene reconstruction.

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Quiz 4: Crime Scene Reconstruction: Blood Stain Pattern Analysis