Question

Question 1

CSI goes to a crime scene and finds this blood stain pattern. Which of these best describes the information from this blood stain?
Responses

A The blood dropped straight down from a 90° angle.The blood dropped straight down from a 90° angle.

B The blood left the victim at a steep angle such as 10°.The blood left the victim at a steep angle such as 10°.

C Blood will never leave this pattern, so it must be something else like paint.Blood will never leave this pattern, so it must be something else like paint.

D It is very likely that this is the only piece of evidence at the crime scene.It is very likely that this is the only piece of evidence at the crime scene.
Question 2

Which of these cannot be determined from directly observing this blood stain?
Responses

A blood typeblood type

B angle the blood fellangle the blood fell

C direction the blood came fromdirection the blood came from

D Approximately how long the blood has been there

Answer 1

I don’t see the stain image — could you upload it? I can’t pick the single best answer without seeing the pattern.

If the stain is an elongated/drop with a tail (oval/tear-drop shape):
- Q1 best answer: B — it left the surface at a low/oblique angle (e.g., ~10°). (A circular, symmetrical stain would indicate ~90°.)
- Q2 best answer: A — you cannot determine blood type just by looking at a stain; that requires lab testing.

Notes:
- “10°” is a very shallow angle (near-parallel to the surface), not “steep.”
- From a stain’s shape you can estimate impact angle and direction of travel, but you cannot reliably determine age or blood type by simple visual inspection.