Categorize the bloodstains into their approximate angle of impact categories.
Categorize the bloodstains into their approximate angle of impact categories.
A is example of an injury that would likely cause high-velocity blood spatter.
A bloodstain pattern is a lateral transfer of wet blood caused by bloody hair being dragged across the floor.
Categorize the bloodstains into their approximate angle of impact categories.
evidence is collected in clean, unused plastic sealed containers at the crime scene.
Confirmation of is performed by conducting a precipitin test.
Which direction was the blood traveling in the following photo?
Blood molecules are attracted to each other and tend to stick together as they fall. This is known as .
Identify and match the forces affecting blood spatter to their proper descriptions.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
gravity | arrow_right_alt | the attraction between molecules of like substances; gives blood a domed shape when resting on a surface |
cohesion | arrow_right_alt | the attraction between molecules of unlike substances; causes blood to cling to porous surfaces |
adhesion | arrow_right_alt | the force of attraction between the earth and another object; gives falling liquids a tear-dropped shape |
Below is an illustration of white and red blood cells. Select the type of cell(s) that can provide individual evidence.
Calculate the percentage of the American population that has A+ blood type:
Identify the various bloodstain patterns shown in the photograph.
To prevent agglutination, blood must be tested for the presence of .
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.
Hemoglobin is found in .
A drop of blood that falls at a 90-degree angle from a wound is a(n) .
Calculate the height of the area of origin in the following diagram. Show your work and round to 2 decimal places.
height =
Place the items in the proper evidence collection procedure categories.
liquid blood evidence
wet bloodstain on a pillowcase
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
sealed plastic container
paper bag
plastic bag
Calculate the missing values in the data table.
Round all answers to 1 decimal place.
angle of impact =
height of area of origin =
Match the blood spatter/nonspatter photos to their correct names.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
| arrow_right_alt | cast-off | |
| arrow_right_alt | saturation | |
| arrow_right_alt | void | |
| arrow_right_alt | drip trail | |
| arrow_right_alt | swipe |
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?
Round all calculated answers to 1 decimal place.
1cm = 10mm
width of blood droplet 2:
length of blood droplet 2:
Calculate the impact angle of blood droplet 2.
distance from edge of blood droplet 2 to center of area of convergence:
Using the scale 1mm = .2 feet, convert the above distance to feet:
Use your answer from the previous question to calculate the height of the area of origin. Round to 1 decimal place:
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.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
| arrow_right_alt | Kastle-Meyer reagent | |
| arrow_right_alt | Luminol test | |
| arrow_right_alt | precipitin test |
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.
B
C
A
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.
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?
