Deck 4: All About Blood

Question 1

What was the next area of the car the team processed?

A) back seating area of the vehicle
B) engine bay
C) roof of the vehicle
D) undercarriage
E) tires

Answer 1

B

Question 2

An apparent red stained droplet and biological tissue were found on what part of the engine bay?

A) reservoir
B) air cleaner
C) spark plug wires
D) battery
E) alternator

Answer 2

A

Question 3

What was found on the engine bay firewall?

A) bloody fingerprints and large medium velocity blood spatter pattern
B) unknown white powder and a syringe
C) bullet hole and blood
D) bullet hole and a spent shell casing
E) latent fingerprints

Answer 3

C

Question 4

What field test did Jenkins utilize to test for the presence of blood in the engine bay?

A) Hemastix test
B) narcotics indicator test
C) acid phosphatase test
D) benedict's test
E) Gettler chloride test

Question 5

The presumptive test for blood is based on a…..

A) color change reacting with heme in blood
B) thermal reaction with heme in blood
C) pH change due to the heme in blood
D) physical change from a liquid to a gas
E) none of the above

Question 6

A blood presumptive Hemastix test involves….

A) an enzymatic reaction
B) reduction oxidation reaction
C) heme found in blood
D) peroxidase activity on a chromogenic compound
E) All of the above

Question 7

After processing the engine bay, what was the next area of the car that needed processing?

A) back of the car
B) back seats
C) tires and wheel wells
D) underneath the car
E) roof of the car

Question 8

What was the major piece of evidence revealed in the back of the vehicle?

A) bullet hole through seats
B) spent shell casings on cargo liner
C) firearm where the spare tire was located
D) large stain on cargo liner
E) high velocity blood spatter on cargo liner and hatch back inner rear window

Question 9

Which phrase best describes who O.J. Simpson is?

A) Heisman trophy winner in football
B) played in the NFL for the Buffalo Bills
C) married to Nicole Brown Simpson
D) abusive and had a history of violence towards his ex-wife
E) all of the above

Question 10

Who were the murder victims?

A) O. J. Simpson
B) Ronald Goldman
C) Nicole Brown Simpson
D) All of the above
E) Choice "b' & 'c' are correct

Question 11

How was the neighborhood first alerted about the murder scene?

A) blood-soaked Akita howling in the night
B) blood was running down the sidewalk
C) neighbors heard a verbal fight between the parties involved
D) vehicle was seen speeding away from the crime scene
E) cat was howling in the middle of the night

Question 12

Which of the items was not found at the murder scene?

A) bloody shoeprints
B) bloody glove
C) knitted watch cap
D) murder weapon
E) pair of eye glasses

Question 13

The majority of the evidence presented in the O.J. Simpson case would logically lead one to a verdict of guilty yet the jury returned a verdict of not guilty. Which of the statements below may have resulted in the acquittal of O.J. Simpson?

A) Mark Fuhrman was portrayed as a racist
B) volume of blood taken for DNA profiling did not add up
C) traces of EDTA were found in the blood samples
D) Dr. Henry Lee's testimony when he uttered the words "something wrong"
E) all of the above

Question 14

In the subsequent civil trial, what was the jury's verdict?

A) not guilty
B) exonerated
C) guilty
D) hung jury
E) mistrial

Question 15

How much blood does the average adult human body contain?

A) 50 malls/kg body weight
B) 60 mgs/kg body weight
C) 70 mgs/kg body weight
D) 80 mgs/kg body weight
E) 90 mgs/kg body weight

Question 16

What percent of blood loss would be fatal?

A) 10%
B) 20%
C) 30%
D) 40%
E) 50%

Question 17

What new evidence items were discovered in the vehicle?

Question 18

(a) What field test was performed on the apparent stains found in the engine bay and cargo liner? (b) describe the chemistry involved in this field test.

Question 19

Taking into account all of the information surrounding the O.J. Simpson trial make a case for both the prosecution and defense.

Question 20

The quantity of apparent blood was significantly greater in the back of the vehicle compared to the apparent blood in the engine bay. Develop a hypothesis that might explain this observation.

Question 21

How can one use blood evidence to hypothesize if the victim may be dead or alive?

Question 22

What is the central idea (s) in this chapter?

Question 23

A presumptive blood test detects the presence of…

A) EDTA (ethylenediaminetetraacetic acid)
B) Antigens
C) Hemoglobin
D) Oxygen
E) Carbon Dioxide

Question 24

The Hemastix and Luminol test involve an Oxidation-Reduction reaction. What does this mean?

A) Loss and gain of electrons respectively
B) Gain and loss of electrons respectively
C) Loss and gain of neutrons respectively
D) Gain and loss of neutrons respectively
E) None of the above

Question 25

Certain plants may present a positive reaction to a Hemastix test. This type of reaction means….

A) a false positive
B) that plants contain hemoglobin
C) all plants possess hemoglobin
D) all of the above are true statements
E) choice 'a" & "d'

Question 26

Blood types and blood compatibility are determined on the presence or absence of…

A) antibodies
B) platelets
C) antigens
D) both a & c
E) both a & b

Question 27

Blood spatter pattern evidence can provide information about a crime scene. Which statement below is something that blood spatter pattern evidence cannot provide about the crime scene.

A) where blood source originated in space
B) can distinguish if it is human or non-human in origin
C) relative speed of the blood source
D) infer type of instrument used in the attack
E) number of times the implement hit a victim

Question 28

Low velocity blood spatter would take on the shape of a…..

A) relatively large circle
B) tear drop shaped
C) fine small mist like dots
D) pattern stain
E) star pattern

Question 29

Medium velocity blood spatter would take on the shape of a…..

A) relatively large circle
B) tear drop shaped
C) fine small mist like dots
D) pattern stain
E) star pattern

Question 30

High velocity blood spatter would take on the shape of a…..

A) relatively large circle
B) tear drop shaped
C) fine small mist like dots
D) pattern stain
E) star pattern

Question 31

Evaluate the pros and cons in using the Hemastix method vs. the Luminol method.

Question 32

When performing a presumptive blood test control sample on a bloody shirt where should the control sample be taken?

A) as far away from the stained area
B) in another area within the same blood stain initially sampled
C) in a different blood stain
D) proximal to the stain, but in an unstained area
E) none of the above

Question 33

Given a stationary dripping blood source what is the relationship between the diameter of the blood drop and drop height distance?

A) directly proportional
B) inversely proportional
C) lower the height the larger the blood drop
D) greater the drop distance the smaller the blood drop
E) no relationship of drop height to blood drop diameter

Question 34

As one increases the angle of the surface what happens to the shape of a blood droplet. (assume perpendicular is 0 degrees and the horizontal is 90 degrees)

A) width to length ratio remains the same
B) width to length ratio gets larger
C) width to length ratio gets smaller than gets larger
D) width to length ratio gets larger than gets smaller
E) none of the above is true

Question 35

The pointed end of a teardrop shaped blood spatter pattern means…?

A) person may have beaten with an implement e.g., baseball bat
B) person may have been bludgeoned with a knife
C) pointed end of the tear-drop shaped blood spatter points in the opposite directions of the blood source
D) is in the category of medium velocity blood spatter
E) all of the above

Question 36

Which of the following would be categorized as a blood transfer stain?

A) cast off from a blood source
B) bloody handprint that comes in contact with a wall
C) cut that is dripping blood onto the floor
D) impact spatter from someone being beaten with hammer
E) all of the above

Question 37

To find the angle of impact of a blood spatter pattern which of the following math functions will derive this answer?

A) Sine = opposite/hypotenuse
B) Tangent = opposite/adjacent
C) Cosine = adjacent/hypotenuse
D) a² + b² = c²
E) none of the above

Question 38

To derive the final height of the blood source in space which of the following math functions would you use?

A) Sine = opposite/hypotenuse
B) Tangent = opposite/adjacent
C) Cosine = adjacent/hypotenuse
D) a² + b² = c²
E) none of the above

Question 39

A Hemastix test involves a color change from yellow to…

A) green
B) blue
C) purple
D) White

Question 40

When a forensic blood spatter expert is asked to assess a crime scene what type of information can be derived from the blood spatter patterns.