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

Gunshot residue on hands

Answer

Trace fiber evidence on clothing

Answer

Accelerant residue in fire debris

Question 2

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

Accepted Answer

Impression evidence

Answer

Trace evidence

Answer

Pattern evidence

Answer

Associative evidence

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

Immediately seal it in a plastic zip-lock bag

Answer

Mix it with a preservative on-site

Answer

Freeze it in liquid nitrogen in the field

Question 4

The 'primary crime scene' is defined as:

Accepted Answer

The location where the crime actually occurred

Answer

The first location discovered by police

Answer

Where the victim's body was found

Answer

The scene with the most evidence

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

Superglue fuming

Answer

Iodine fuming

Answer

Magnetic powder dusting

Question 6

A forensic investigator uses an alternate light source (ALS) at a crime scene primarily to:

Accepted Answer

Visualize evidence that is not visible under normal white light, such as latent prints and biological fluids

Answer

Photograph evidence in high resolution

Answer

Test surfaces chemically for blood

Answer

Determine the age of fingerprints