Bloodstain Pattern Analysis

Front 1

Crime scene reconstruction is the process of?

Back 1

recreating a criminal event through analysis of physical and biological evidence along with testimonial evidence

Front 2

Physical evidence includes such things as _______, ___ and ____ impressions, and other objects found at the crime scene to help tell the tale

Back 2

fingerprints; shoe; tire

Front 3

Testimonial evidence are _____ accounts of what they observed using there senses

Back 3

witness

Front 4

One of the most help elements of crime scene reconstruction is Bloodstain Pattern Analysis. This type of analysis works so well as it relies on the fact that blood is:

Back 4

a fluid and will react to external forces in a predictable fashion

Front 5

What are the five different types of external forces that can have an effect on blood patterns?

Back 5

Surface tension of blood, viscosity, forces, gravity, air resistance

Front 6

What are the two different bloodstain families?

Back 6

spatter and non-spatter

Front 7

Of the spatter family, there are _____ spatters and _____ spatters

Back 7

linear; non-linear

Front 8

Linear spatters include spurt, cast-off, and

Back 8

drip trails

Front 9

Non-linear spatters include impact pattern, drips, and _______ spatter.

Back 9

expectorate

Front 10

Of the non-spatter family, there are _____ margin and ____ margin bloodstain patterns

Back 10

irregular; regular

Front 11

Irregular margin includes gush/splash, blood into blood, and

Back 11

smear

Front 12

Regular margin includes flow, saturation, and

Back 12

pattern transfer

Front 13

Spatter is usually characterized by an ________ or ______ shape

Back 13

elliptical; circular

Front 14

The parent stain is the primary stain, and stains known as _____ may be 'thrown off' the parent stain

Back 14

satellite

Front 15

A spurt is blood ejected...

Back 15

under pressure

Front 16

Cast off occurs when blood is flung from an object in motion or that suddenly stops motion. The two types of cast off patterns are

Back 16

swing cast off, cessation cast off

Front 17

Drip trails show _______ of the drippring item from point to point

Back 17

movement

Front 18

Impact patterns have _____ distribution, and change in shape as it moves further from the ______ of the pattern

Back 18

radiated; center

Front 19

What are the three types of impact patterns?

Back 19

low velocity, medium velocity, high velocity

Front 20

The velocity of an impact pattern is measured by the

Back 20

size of the drops

Front 21

An impact pattern is found to have drops of 3 mm or more. This would be considered a _____ pattern

Back 21

low velocity

Front 22

An impact pattern has drops less then a millimeter, an effect also known as atomizing or misting. This is a ______ impact pattern.

Back 22

high velocity

Front 23

Expectorate spatter is created when blood is forced from the _______ system

Back 23

respiratory system

Front 24

What three things may be contained in expectorate spatter?

Back 24

air vacuoles, mucous strands, epithelial cells

Front 25

A non linear spatter where blood is dripping from a person or bloodied object:

Back 25

drips

Front 26

The parent stain of a drips pattern will be ____ in diameter

Back 26

3-25 mm

Front 27

Non-spatter family is

Back 27

any other stain not defined as a spatter pattern

Front 28

Characteristics of non-spatter patterns include no evident _______ component, may contain a combination of ____ or ______ margins, may contain _______ and _________.

Back 28

elliptical;irregular;regular;feathering;striation

Front 29

An irregular margin is usually characterized by an irregular or _____ margin.

Back 29

spiny

Front 30

Regular margins generally have ____ edges

Back 30

clean

Front 31

The non-spatter irregular margin patten that comes from blood being ejected in volume

Back 31

Gush/Splash

Front 32

Gush/splash stains creat a large _____ stain with _____ and perhaps even spatter radiating from it

Back 32

irregular; spines

Front 33

This non-spatter irregular margin occurs when blood drips into another stain resulting in accumulation or secondary spatter oriented around the stain

Back 33

blood into blood

Front 34

Smear stain

Back 34

a non-spatter irregular marging stain that is the transfer of blood from one object to another through lateral contact

Front 35

What are four things you may see on a smear stain?

Back 35

feathering, striations, diminished volume of blood across stain, displacement of blood

Front 36

What are two different types of smear stains?

Back 36

wipes and swipes

Front 37

A wipe smear stain is when an object moves through a _________ blood stain on a surface

Back 37

pre-existing

Front 38

In a wipe smear stain, blood must move outside the original ____ of the stain

Back 38

boundary

Front 39

The dried outer ring of a wide smear stain is known as

Back 39

skeletonization

Front 40

A swipe smear stain has a contiguous boundary on one side and any of the following:

Back 40

feathered boundary, striations, dimished volume of blood across stain, accumulation of blood on boundaries

Front 41

A swipe smear is when a blood object in ____ comes in contact with another object

Back 41

motion

Front 42

The non-spatter regular margin stain that is created by transger of blood from one object to another in which a recognizable characteristic is present

Back 42

pattern transfer

Front 43

The non-spatter regular stain that is an accumulation of blood due to gravity and conforms to pooling area

Back 43

pool

Front 44

In a pool pattern, you may see serum seperation or _______

Back 44

clotting

Front 45

Objects left in the pool will creat a _____ where blood will flow around

Back 45

void

Front 46

The non-spatter regular blood pattern stain that shows the movement of liquid blood as mass under gravity

Back 46

flow

Front 47

Bloodstain pattern analysis is a scientific approach to the analysis of blood as it relates to the...

Back 47

crime scene

Front 48

What is the 8 step approach?

Back 48

a practival methodology for analyzing blood evidence

Front 49

The first step of the 8 step approach:

Back 49

familiarize self with the scene

Front 50

The second step of the 8 step approach:

Back 50

identify discrete patterns

Front 51

The third step of the 8 step approach:

Back 51

categorize patterns

Front 52

The fourth step of the 8 step approach:

Back 52

evaluate directionality and motion for the pattern

Front 53

The fifth step of the 8 step approach:

Back 53

evaluate interrelationships among patterns and other evidence

Front 54

The sixth step of the 8 step approach:

Back 54

evaluate viable source events to explain pattern

Front 55

The seventh step of the 8 step approach:

Back 55

define best explanation of events

Front 56

The eighth step of the 8 step approach:

Back 56

NONE! There were only seven listed! What the hell! Lies!

Front 57

The MISSING STEP IN THE LIST (GEEZ) was point of _______ and occurs after evaluating aspects of directionality and motion.

Back 57

convergence

Front 58

One way of documenting blood with photography is known as the ____ method, which is uding known distance squares of overlaying the stain to place the stain within area.

Back 58

grid

Front 59

Another method of documenting blood with the use of photography is the ___ ____ method, which involves aligning rulers around ther merimeter of the area.

Back 59

point-ruler