Blood & Blood spatter Check-in (10/24/2024)

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.

2

Categorize the bloodstains into their approximate angle of impact categories.

1

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

1

Confirmation of __________ is performed by conducting a precipitin 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. This is known as __________.

3

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

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

1

Below is an illustration of white and red blood cells. Select the type of cell(s) that can provide individual evidence.

1

Calculate the percentage of the American population that has A+ blood type:
_______ % (round to 1 decimal place)

3

Identify the various bloodstain patterns shown in the photograph.

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

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.

liquid blood evidence
why would you package any blood evidence in a plastic bag. that's indecent
(drag this item to the plastic bag category)
dried blood on a sock
wet bloodstain on a pillowcase

sealed plastic container
paper bag
plastic bag

2

Calculate the missing values in the data table. 

Round all answers 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
		saturation
		void
		drip trail
		swipe

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.

1cm = 10mm

width of blood droplet 2: _______ mm (answer should be a whole number)
length of blood droplet 2: _______ mm (answer should be a whole number)
Calculate the impact angle of blood droplet 2._______° (1 decimal place)

distance from edge of blood droplet 2 to center of area of convergence: _______ mm (answer should be a whole number)
Using the scale 1mm = .2 feet, convert the above distance to feet: _______ feet (1 decimal place)

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

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
		precipitin test

3

Which of the following can be used to estimate the area of origin? (Select 3)

1

Select 3 drops that struck the surface closest to 90°.

1

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

B
C
A

1

Use the results of each test to determine whether the blood on each suspect’s bumper is of human origin.

Select the following gel diffusion diagram(s) that show a positive reaction for human blood.

2

Using the following blood-typing results, indicate the apparent blood type recovered from Vehicles B and C. Determine whether the blood from the car of each suspect is consistent with the victim’s blood type of AB negative.


Vehicle B: 
Blood type? __________
Consistent with victim's blood type?__________

Vehicle C: 
Blood type? __________
Consistent with victim's blood type?__________

Blood & Blood spatter Check-in (10/24/2024)

Categorize the bloodstains into their approximate angle of impact categories.

Which direction was the blood traveling in the following photo?

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

Below is an illustration of white and red blood cells. Select the type of cell(s) that can provide individual evidence.

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

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

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

Place the items in the proper evidence collection procedure categories.

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

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)

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

Which of the following can be used to estimate the area of origin? (Select 3)

Select 3 drops that struck the surface closest to 90°.

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

Use the results of each test to determine whether the blood on each suspect’s bumper is of human origin.Select the following gel diffusion diagram(s) that show a positive reaction for human blood.

Categorize the bloodstains into their approximate angle of impact categories.

Which direction was the blood traveling in the following photo?

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

Below is an illustration of white and red blood cells. Select the type of cell(s) that can provide individual evidence.

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

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

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

Place the items in the proper evidence collection procedure categories.

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

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)

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

Which of the following can be used to estimate the area of origin? (Select 3)

Select 3 drops that struck the surface closest to 90°.

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

Use the results of each test to determine whether the blood on each suspect’s bumper is of human origin.Select the following gel diffusion diagram(s) that show a positive reaction for human blood.

Use the results of each test to determine whether the blood on each suspect’s bumper is of human origin.

Select the following gel diffusion diagram(s) that show a positive reaction for human blood.

Use the results of each test to determine whether the blood on each suspect’s bumper is of human origin.

Select the following gel diffusion diagram(s) that show a positive reaction for human blood.