Blood and blood spatter Celebration #2

1

A __________ is an 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 that was once present in the sink and washed away can be detected using _____________.

1

When blood molecules are attracted to the surface they come into contact with, this is known as __________.

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

sealed plastic container
paper bag
plastic bag

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
		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.

Which suspect should the police continue investigating 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

2

Answer the following question based on the following illustration:

The surface of red blood cells have different __________. Judging by the 2 different types of symbols shown, this individual would most likely have type__________ blood.

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.

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):

3

Examine the 9 blood droplets. Which 3 drops struck the surface farthest from a 90-degree angle?

2

Calculate the impact angle of blood droplet A and B. Round all answers to 2 decimal places.

Impact angle = sin-1(width/length)

A: _______ degrees
B: _______ degrees

1

The white circled area in the following image indicates the __________.

1

Which direction was the blood traveling in the following photo?

Blood that was once present in the sink and washed away can be detected using _____________.

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

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

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

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.

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

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

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

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 all that apply):

Examine the 9 blood droplets. Which 3 drops struck the surface farthest from a 90-degree angle?

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