Basics
Should you store bloody clothes in a plastic bag or a paper bag?
Paper bag (prevents mold)
If a blood drop hits the floor at a perfect 90-degree angle, what shape will it be?
Circle
What do you call blood that is flung off a moving object, like a baseball bat?
Cast off
True or False: By looking at blood drops, you can figure out where the victim was standing.
true
True or False: You can always tell exactly who the killer is just by looking at one drop of blood with your eyes.
False(need a DNA test)
True or False: You can get a person's DNA from their Red blood cells.
False (Red cells don't have a nucleus; White cells have the DNA).
A blood drop shaped like a teardrop has a "tail." Does that tail point where the blood came from or where it was going?
Where it was going
Which injury creates a "mist" of tiny blood droplets: a gunshot or a punch to the nose?
Gunshot
Investigators draw straight lines through blood drops to see where they cross. What is that crossing point called?
Area of Convergence
If a killer tries to wash a floor with bleach, what chemical can a CSI spray to still see where the blood was?
Luminol
What is the most common blood type in the U.S. population?
Type O
If blood lands on a rough surface like a brick, do the edges of the drop look smooth or jagged?
Jagged
If someone with a bloody hand touches a clean wall, what is that pattern called?
Swipe, handprint
If blood is spraying out in big "waves" that match the rhythm of a heartbeat, what was cut?
An Artery
In the 1990s, the O.J. Simpson trial became famous because the police were accused of being messy with what?
Evidence,
What chemical do investigators spray to make blood glow blue even if the room is dark?
Luminol
What do you call the tiny, separate droplets that "splash" away from a big drop of blood?
Satellites
If there is a "blank spot" in a blood-covered wall because someone was standing in the way, what is that called?
Void
What tool do investigators often use to find the "3D" spot where a victim was hit?
String
If an investigator finds a bloodstain that looks like it has "bubbles" or "saliva" in it, what happened to the victim?
coughed it up( came from mouth or nose)
This property causes blood to stay in a round "bead" shape as it falls through the air
Cohesion
As the angle of impact gets smaller (closer to the floor), does the bloodstain get shorter or longer?
Longer
If a blood pattern has "air bubbles" in it, what part of the body did the blood likely come from?
Nose or mouth
If a blood drop is twice as long as it is wide, was it hit from a high angle or a low, shallow angle?
Low/shallow angle
If you find a trail of blood drops on the floor leading away from the body, what does that tell you about the killer?
They were moving (it shows their path or direction)