Blood & Blood spatter Celebration #3 - Robert Ly | Library

1

A __________ is example of an injury that would likely cause high-velocity blood spatter.

1

A __________ bloodstain pattern is a lateral transfer of wet blood caused by bloody hair being dragged across the floor.

1

__________ evidence is collected in clean, unused plastic sealed containers at the crime scene.

1

Confirmation of __________ is performed by conducting an ELISA test.

1

Which direction was the blood traveling in the following photo?

1

Blood molecules are attracted to each other and tend to stick together as they fall, called __________.

3

Identify and match the forces affecting blood spatter to their proper descriptions.

Draggable item		Corresponding Item
cohesion		the attraction between molecules of like substances; gives blood a domed shape when resting on a surface
adhesion		the attraction between molecules of unlike substances; causes blood to cling to porous surfaces
gravity		the force of attraction between the earth and another object; gives falling liquids a tear-dropped shape

1

Calculate the percentage of the American population that has AB+ blood type:
_______ % (include 2 decimal places in your answer)

3

Identify the various bloodstain patterns shown in the photograph.

Satellites occur when a droplet of blood strikes a surface, _____.

1

During the walk-through of a crime scene, an investigator would consider the possibility that _____.

1

Blood consists of two components of circulating connective tissue, red blood cells and white blood cells, suspended in plasma.

1

Storage of liquid blood in plastic must be less than two hours to prevent contamination.

1

Hemoglobin is found in __________.

1

A drop of blood that falls at a 90-degree angle from a wound is a(n) __________.

1

Calculate the height of the area of origin in the following diagram. Show your work and round to 2 decimal places.
height = _______ feet

4

Place the items in the proper evidence collection procedure categories.

wet bloodstain on a pillowcase
liquid blood evidence
dried blood on a sock

sealed plastic container

2

Calculate the missing values in the data table. Round to 1 decimal place.

angle of impact = _______°
height of area of origin = _______ feet

5

Match the blood spatter/nonspatter photos to their correct names.

Draggable item		Corresponding Item
		cast-off

1

CSIs performed an antibody test on liquid blood recovered from a crime scene. The results are shown below:

3 suspects were taken in for questioning and each provided a sample of blood. The results are shown in the table below:


Suspect A has __________ blood type.
Suspect B has __________ blood type.
Suspect C has __________ blood type.

Should the police continue investigating any of these suspects as potential owners of the crime scene blood? __________

3

Round all calculated answers to 1 decimal place.

width of blood droplet 2: _______ mm
length of blood droplet 2: _______ mm
Calculate the impact angle of blood droplet 2._______°

distance from edge of blood droplet 2 to center of area of convergence: _______ mm
Using the scale 1mm = .2 feet, convert the above distance to feet: _______ feet

Use your answer from the previous question to calculate the height of the area of origin. Round to 1 decimal place: _______ feet

1

White blood cells are responsible for the antigen-antibody response.

1

Blood consists of three components of circulating connective tissue, red blood cells, white blood cells, and platelets suspended in plasma.

1

CSI's utilize the string method in order to estimate the area of convergence.

0

Select all zones that show the area of convergence for blood droplets.

1

Mr. Ly cut his finger while cutting a guava this morning. In order to ascertain whether or not this is human blood scientists must use a(n)

3

Match the pictures to the blood test best associated with it.

Draggable item		Corresponding Item
		Kastle-Meyer reagent
		Luminol test
		ELISA test

3

Which of the following can be used to estimate the area of origin? (Select all that apply):

1

Order the following droplets from lowest impact angle (0° is lowest) to highest.

C
A
B

Draggable item		Corresponding Item
		cast-off
		saturation
		void
		drip trail
		swipe