Forensic Blood

Which direction was this blood drop traveling?

• south to north

• east to west

• west to east

• north to south

Quentin is a crime scene investigator. He believes a violent crime may have occurred in the bedroom of an apartment but he sees no blood. Which of the following chemicals reacts with iron produces a glowing blue color if blood is present?

• Luminol

• Fluorescein

• HemaStix

• LCV

What type of blood spatter is typically created from a gunshot?

• medium velocity impact spatter

• high velocity impact spatter

• cast off

• void

Which of the following CANNOT be determined from blood spatter?

• Exact Weapon Used

• Manner of Death

• Velocity

• Area of Origin

How does the velocity of impact change the blood stain pattern?

• Higher velocity, larger diameter

• higher velocity, smaller diameter

• lower velocity, smaller diameter

• Medium velocity, small diameter

he drop shown above would have more than likely been dropped from an angle of

• 90

• 50

• 30

• 10

Tags

NGSS.MS-PS2-4

A blood droplet has a width of 5 mm and a length of 6 mm.  What is the angle of impact?

• 90 degrees

• 56 degrees

• 65 degrees

• 46 degrees

Which one of these was dropped from the biggest angle?

• (top left)

• (top right)

• (bottom left)

• (bottom right)

Tags

NGSS.MS-PS2-4

Blood typing is considered

• a class characteristic

• an individual characteristic

• both of these

• neither of these

Which chemical is commonly used to detect the presence of blood at a crime scene due to its reaction with hemoglobin?

• Luminol

• Hydrogen peroxide

• Sodium chloride

• Acetic acid