CFC Bloodstain Pattern Analysis 3

Question 1

When reconstructing a bloodstain scene, a 'void' pattern is significant because it suggests:

Accepted Answer

An object or person was present and blocked blood deposition

Answer

A void pattern is a bloodstain-free area within otherwise consistent spatter, indicating that an object or person shielded that surface from blood at the time of the event.

Question 2

What effect does surface texture have on bloodstain morphology?

Accepted Answer

Rough surfaces produce more irregular edges and satellite spatter

Answer

Rough or porous surfaces cause blood droplets to produce more irregular, scalloped edges with additional satellite spatter due to increased surface energy and disruption of the droplet.

Question 3

A 'wipe' pattern differs from a 'swipe' pattern in that a wipe:

Accepted Answer

Results from a clean object moving through existing wet blood

Answer

A wipe pattern is produced when a clean object moves through existing wet blood, while a swipe is produced when a bloody object contacts a clean surface.

Question 4

In court testimony, a BPA expert using the term 'consistent with' rather than 'caused by' is:

Accepted Answer

Appropriately reflecting the probabilistic nature of physical evidence interpretation

Answer

Physical evidence interpretation is inherently probabilistic; 'consistent with' accurately conveys that the evidence supports a hypothesis without overstating certainty.

Question 5

Which bloodstain pattern would most strongly suggest a body was moved after blood had begun to pool?

Accepted Answer

Drag pattern with smearing and trail

Answer

A drag pattern with smearing and blood trail indicates a body or object was moved through pooled blood, redistributing it in the direction of movement.

(CFC) Certified Forensic Consultant Practice Test

(CFC) Certified Forensic Consultant Practice Test

CFC Bloodstain Pattern Analysis 3