FKA3 Flashcards
When processing the scene of a death, what are some considerations prior to moving the body?
Photographs
Visual examination - consider using a LS laser or flashlight
Notes
Preserve evidence on hands and feet and head by bagging as necessary
Physical measurements
Name the common biohazards associated with violent crime or death scenes, as well as which artifacts within the scene present biohazrds
Blood
Urine
Faecal matter
Spit
Vomit
Needles
Airborne particles
Biohazard’s include communicable diseases, such as HIV and hepatitis
What is adipocere?
A great white matter produced by the hydrolysis and hydrogenation of lipids. The formation is facilitated by cold, wet and anaerobic conditions or environments. Depending on the conditions it can begin to form as early as two weeks to a month. Tissues kept in plastic or immersed make show uniform information.
What is forensic odontology?
The application of the signs of dentistry, to the field of law, or investigation of a crime. It can be helpful in identifying human remains through bite analysis and can also be used for bite mark analysis. dental patterns are unique and cannot be burned or cut to change the pattern.
In nanometers what is the wavelength of visible portion of the electromagnetic spectrum?
400 nm to 700 nm
Define thermoluminescence
When light is emitted as a result of heating an object.
Example heating element of a stove
Define chemiluminescence
When light is emitted as a byproduct of a chemical reaction
Example glow sticks or blue star/Luminol
Define bioluminescence
When light is emitted by an organism
Example fire flies
Define photoluminescence including phosphorescence and fluorescence
Photoluminescent is the emission of light as a result of absorbing incident light
Phosphorescence occurs when the emission of light continues after the light source is removed. Example glow-in-the-dark stickers.
Fluorescence occurs when the emission of light stops after the light source is removed. Example chemical dyes used in exhibit processing.
During the process of qualifying yourself as an expert in court defence council asks you are you an expert in the location, development collection, analysis, and identification of fingerprints. How would you answer this?
These are all part of my duties as a member of forensic identification services, the determination of whether I am qualified as an expert lies with the courts. I am confident that based on my knowledge, training and experience, I am able to provide accurate expert testimony.
Often forensic identification personnel will make reference in their reports to unsuitable friction ridge impressions. How would you clarify this expression to the courts to reflect your impartiality?
A suitable impression is one that through a thorough analysis is determined to contain sufficient detail or information that can be used to identify or exclude a known source.
How are fingerprints or physical evidence developed at a crime scene to be marked prior to photographing and lifting?
R#
Date
File number
Examiners initials
Demarcation line or circle around the impression
An arrow pointing up on vertical surfaces to assist in determining directionality
is it likely that the ridge detail of a fingerprint which with is developed with chemistry powder can be further enhanced by the application of lightning gray powder? What about the reverse?
Yes, lightning gray powder is a finer powder that can be used to clean up an impression initially developed with chemist grey. However, chemist gray cannot be used after the application of lightning grey powder, as this will obliterate the impression.
What method would you use to develop or enhance a fingerprint on a waxy or oily surface?
Cyanoacrylate fuming and chemical dyes
Fluorescence exam
Sudan black
And chemist grey powder
List two recommended methods of developing or enhancing latent fingerprints on plastic bags
Cyanoacrylate fuming and possible chemical dye staining
Vacuum metal deposition
If silver gray powder is used to examine a black plastic cash register tray what will probably happen to the fingerprint powder when it is applied?
The powder will flood the surface, obliterating any impressions
List two recommended methods of lifting a finger print from a very rough or oddly shaped surface
Rubber casting compound
Gel lifter
Gel glue or caulk
Where were you find the recommended formula for preparing ninhydrin working solution
Standardized operating guidelines number 411
Chemical recipe book in lab
Which technique is recommended for developing fingerprints on wet or damp, nonporous surfaces
Small Particle Reagent
Molybdenum disulphide
How can you intensify a week fingerprint developed with magnetic fingerprint powder
Blowing a guttural breath over the impression
Chemical processes
Describe the cyanoacrylate fingerprint development process
Cyanoacrylate is heated within a humidity chamber, creating cyanoacrylate vapors. The vapours polymerize in the presence of humidity and form a white deposit or film on the fingerprints on non-porous surfaces. The impressions may be visualized alone, or may require the use of chemical dyes.
Name five different chemical reagents that could be used to enhance fingerprints in blood
Aqueous leuco crystal violet
Acid black one (amido black)
Acid Violet 17
Acid yellow 7
DFO
Ninhydrin
Vacuum metal deposition
Hungarian red
Comassee blue
How would you enhance a friction ridge impression believe to be in blood on a dark coloured non-porous surface?
Fluorescence exam
Infrared photography
Chemist grey powder
Acid yellow 7
Methyl based titanium dioxide
Acid violet 17