Blood Stain Pattern Analysis

The video tutorial covers blood spatter analysis, explaining how blood stains can help determine the events at a crime scene. It discusses the characteristics and dynamics of blood drops, types of blood stain patterns, and techniques for analyzing blood spatter to reconstruct crime scenes. The tutorial also provides guidance on collecting and storing blood evidence safely.

What can blood spatter analysis help determine at a crime scene?

• The direction of blood travel and type of violent act

• The time of day the crime occurred

• The type of weapon used

• The number of people involved

What shape do blood drops take when falling through the air?

• Spherical

• Teardrop

• Flat

• Oval

How does the surface type affect the appearance of a blood drop?

• It changes the color of the blood

• It alters the blood's chemical composition

• It affects the size of the blood drop

• It determines the presence of spikes and satellites

What happens to a blood drop when it reaches terminal velocity?

• It becomes larger

• It hits the surface with the same force regardless of height

• It changes color

• It stops moving

Which of the following is a type of blood stain pattern?

• Dynamic drops

• Passive drops

• Static drops

• Active drops

What is a cast-off pattern?

• Blood flung from a weapon in motion

• Blood that has dried over time

• Blood drops that fall straight down

• Blood transferred from one surface to another

What is the difference between a wipe and a swipe in blood stain patterns?

• A wipe is when blood is splattered, a swipe is when blood is smeared

• A wipe is when blood is removed from a surface, a swipe is when blood is added to a surface

• A wipe is when blood is smeared, a swipe is when blood is splattered

• A wipe is when blood is added to a surface, a swipe is when blood is removed from a surface

How can forensic scientists use skeletonization in blood stains?

• To estimate how long the blood has been present

• To determine the blood type

• To identify the victim

• To find the source of the blood

What is the first step in collecting blood evidence at a crime scene?

• Wearing protective equipment

• Labeling the evidence

• Drying the blood sample

• Storing the blood in a fridge

Why is it important to dry blood samples before storing them?

• To prevent contamination

• To change the blood's color

• To make them easier to transport

• To preserve the evidence