Forensics Review Unit 1-3

What is the role of a forensic investigator?

• responsible for investigating evidence found at a crime scene. They may take photos of the crime scene, collect samples and examine evidence in a lab

• investigating structures that have failed or do not function properly

• responsible for conducting autopsies on bodies to determine the cause of death

• assess physical evidence from a crime scene using various methods of analysis, including chemical, instrumental and microscopic methods

Early collection of fibers in an investigation is critical.  Within 24 hours, an estimated:

• 75% of all fibers fallen or lost
• 85% of all fibers fallen or lost
• 95% of all fibers fallen or lost
• None of the above

Natural fibers can be harvested from

• plants and animals only
• plants, animals and minerals only
• animals only
• plants only

When arson investigators begin their work, they are in search of the point of origin of the fire.

• True

• False

The heavier fire damage is found at...

• the point of origin.

• the ceiling.

• the floor.

• at the top of the fire.

What is a written record of all people who have had possession of an item of evidence?

• chain of custody
• crime scene documentation
• notes taken by first officer on scene
• crime scene sketch

when securing a crime scene the two most important factors are to

• scan the scene, separate the witnesses
• safety of individuals, separate the witnesses
• see the scene, preserving evidence
• safety of individual, preserving evidence

Which of the following is the correct formula for calculating the density of glass?

• D= m/V
• D= V/m
• D= m x V
• D= 2mV

Which glass break was made first?

• A
• B

Which of these databases are used to hold information about all bullets and casings that have been retrieved from crime scenes or test fires?

• NIBIN

• CODIS

• AFIS

• ERHS