BSFS Crime Scene Investigation and Evidence Collection 2

Question 1

Luminol is used at crime scenes to detect:

Accepted Answer

Latent bloodstains that have been cleaned or are otherwise invisible

Answer

Luminol reacts with the iron in hemoglobin to produce chemiluminescence, revealing bloodstains even after vigorous cleaning attempts.

Question 2

What type of evidence is a shoe print found in soft soil at a crime scene?

Accepted Answer

Impression evidence

Answer

Shoe prints, tire tracks, and tool marks in malleable surfaces are classified as impression evidence because they capture the three-dimensional form of the object.

Question 3

When collecting a wet blood sample from a crime scene for preservation, a forensic scientist should:

Accepted Answer

Allow it to air dry completely before packaging in paper

Answer

Wet blood must be air dried before paper packaging to prevent microbial growth and DNA degradation caused by trapped moisture.

Question 4

The 'primary crime scene' is defined as:

Accepted Answer

The location where the crime actually occurred

Answer

The primary crime scene is where the actual crime took place, which may differ from where a body or evidence is later found (secondary scene).

Question 5

Which technique is used to cast three-dimensional impressions (such as footwear or tire tracks) at a crime scene?

Accepted Answer

Dental stone (plaster of Paris) casting

Answer

Dental stone is poured into the impression to create a durable three-dimensional cast that can be compared with known footwear or tires in the laboratory.

BSFS - Bachelor of Science in Forensic Science Practice Test

BSFS - Bachelor of Science in Forensic Science Practice Test

BSFS Crime Scene Investigation and Evidence Collection 2