Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Forensic summative
| Question | Answer |
|---|---|
| Why are fires investigated? What are the possible motives an arsonist may have? | fires are investigated to determine the cause of its start - either intentional or accidental. Possible motive for intentional starting of fires include vandalism, excitement, revenge, profit, extremism (terrorism), or to concealment of another crime. |
| What differentiates a fire scene from other crime scenes? Special considerations? | A fire scene is different from other crime scenes in that substantial damage or other contamination of the crime scene occurs from first responders. Often valuable forensic evidence is lost due to fire destruction and the subsequent efforts to extinguish |
| Describe the processing of a fire crime scene. | Fire suppression commander/crew are in command of the scene. Immediately photograph/video the fire scene including onlookers. Document weather, smoke, and fire observed. Identify the place of origin for fire. Once place of origin is established, ide |
| What is meant by the fire triangle? | Fire is a chemical process in which heat, fuel and oxygen are required to it to occur. |
| Describe how the V-pattern, drop pattern and trailers/streamers provide forensic evidence to investigators? | All of these are burn patterns, which show the physical effects, such as charring, smoke and soot deposits, changes in the character of materials, and the consumption of consumables that may indicate the ignition source. V-pattern: cone shaped plume f |
| What is the difference between hair and fiber? | Hair is the fine threadlike strand growing from the skin of humans, mammals, and some other animal, while fibers are defined as the smallest part of a textile material. |
| What is the collection process for this evidence? | Hair/fiber evidence placed in a hand made paper envelope fold. Paper envelope placed in larger paper envelope. Sealed with tape, initialed, and documented/referenced. |
| Morphological evidence identified from these samples include: | Length, shape, size, color, stiffness, curliness, and microscopic appearance. |
| What are the three main components of hair? | |
| What are the three stages of the hair ‘life cycle’ and describe them in one sentence. | Anagen Phase - Initial growth phase. The root is attached to the follicle for continued growth giving the root bulb a flame like appearance. This phase lasts up to 6 yrs. Catagen Phase - Hair continues to grow but at a slower rate. Roots appear elongat |
| What is the most straightforward way to determine if a hair sample is from a human or animal? | Medullary Index - The ratio of the medulla width to the width of the hair. Less than 0.3 would be human. Greater than 0.3 is considered animal hair. |
| What kind of evidence can be obtained and how is each found on the sample? | Hair and fiber morphological characteristic evidence is class evidence. DNA fingerprinting evidence is individualized evidence. DNA may be obtained from the root of hair evidence. |
| Bagging/Collecting techniques: | Bodily Fluids: Always collect and place in a plastic bag/container to preserve any moisture/DNA evidence. Place into a sealed plastic container into a paper bag, give evidence number, tape (date and initial seal). Non-biological evidence: Can be colle |
| Types of body fluids: | Saliva, blood, urine, semen, vaginal fluids. |
| Toxicology | Toxicology is the study of traces of drugs or alcohol within a person's body fluids. |
| Serology | The study of how blood serum and the immune system react to pathogens or introduced substances |
Created by:
mswiniarski25
Popular Criminal Justice sets