Course

Question 1

Who is the researcher that experimented with rabbits?

Answer 1

Dr Eduard Piotrowski

Question 2

Why is Dr Eduard Piotrowski important to BPA?

Answer 2

He recognized the dynamic nature of blood by conducting experiments using live rabbits and created graphic drawings of the results.

Question 3

Who was the researcher who discovered the relationship between the width of an elliptical bloodstain and the length of an elliptical bloodstain?

Answer 3

Dr Victor Balthazard - there is a ratio and can information can be used in string method to determine area of origin

Question 4

What is the first court case in Canada to hear bloodstain pattern evidence?

Answer 4

R v Sparrow in 1976

Question 5

Why is R v Sparrow important to BPA

Answer 5

Bloodstain pattern analysis was conducted on clothing and a vehicle to convict a person of murder

Question 6

How many types of blood were used in the study that compared Human blood to animal blood? What were they?

Answer 6

Four 
Bovine 
Equine 
Swine 
Sheep

Question 7

What are the three categories of bloodstain patterns?

Answer 7

Gravity
Spatter
Transfer

Question 8

What is a drip stain?

Answer 8

A blood stain resulting from a falling drop that formed due to gravity.

Question 9

How many litres of blood does the average adult male have?

Answer 9

4 to 6 litres

Question 10

What is Bloodstain Pattern Analysis?

Answer 10

It is the examination of the SIZE, SHAPE, LOCATION, and the distribution pattern of bloodstains, in order to provide an interpretation of the physical events which gave rise to their origin.

Question 11

What are the two basic premises of BPA?

Answer 11

It is predictable and reproducible

Question 12

How to do you seize clothing to be analyzed by a BPA later?

Answer 12

Place flat between two pieces of clean flat paper and then roll or fold.
Hang to dry
Photograph

Question 13

What is the most important thing to do when seizing clothes from an accused?

Answer 13

Take photographs of the items on accused if possible and use scales.

Question 14

What is the best type of stain to use use from clothing for a DNA analysis?

Answer 14

Spatter stains

Question 15

What are some characteristics of fabric that cause limitation on the examination of clothing?

Answer 15

Type of fabric
Texture
Condition
Washed/unwashed

Question 16

What are some limitations of BPA on clothing?

Answer 16

The appearance and directionality can be affected by a number of factors
Bloodstains can be distorted on certain fabrics

Question 17

What is kinetic energy?

Answer 17

It is the energy that an object possesses due to its motion

Question 18

What is forward spatter pattern?

Answer 18

It is a bloodstain resulting from the blood drops that traveled in the same direction as the impact force.

Example: the spatter away from a shooter

Question 19

What is back spatter pattern?

Answer 19

A bloodstain pattern resulting from blood drops that traveled in the opposite direction of the external force applied; associated with an entrance wound created by a projectile.

Example: spatter back towards a shooter

Question 20

What are the three Newtons Laws of motion?

Answer 20

An object at rest remains at rest and an object in motion, with a constant velocity, unless it experiences a net external force

Acceleration of an object is directly proportional to the force acting on it & is inversely proportional to mass

Every action has an equal and opposite reaction.

Question 21

What are the two properties of blood?

Answer 21

Viscosity (thickness)

Surface tension (it is trying to stay together)

Question 22

What is the area of convergence?

Answer 22

It is the 2 dimensional location of the blood source

Question 23

What is the area of origin?

Answer 23

It is the 3 dimensional location of where the spatter originated.

Question 24

What are e components of scientific methodology?

Answer 24

Identify the problem 
Gather information 
Document observations 
Formulate hypothesis and test if needed 
Analyze data
Report data
Review

Question 25

When a FIS member is gathering information from a crime scene they are providing what kind of information?

Answer 25

Size,
Shape,
Locations
Number of stains

Question 26

How is a bloodletting scene documented?

Answer 26

Photos (overall midrange and close up)
Sketch
Notes
Photos including scales

Question 27

If you put the notation H+ beside a bloodstain what should it denote.

Answer 27

That a presumptive test (Hemastic) for blood

Question 28

How should you refer to a bloodstain when making notes?

Answer 28

Call it a bloodstain. DO NOT classsify the stain.

Question 29

The deceased needs to be removed from the crime scene prior to BPA analyst arriving. Is it important to mark where the body was was prior to its removal. Why?

Answer 29

Yes as it shows where the body was in relation to any bloodstains.

Question 30

How should photographs of bloodstains be taken?

Answer 30

Perpendicular

Question 31

What is the definition of area of convergence?

Answer 31

The 2 dimensional location of the blood source. It is found in the area containing the intersections generated by lines drawn through the long axes of individual stains.

Use different colour pens to draw lines from the different sides

Question 32

When should you be in contact with the bloodstain pattern analyst while capturing the crime scene?

Answer 32

All the time and often