Quizzes - 2nd Half Flashcards
List three considerations when determining how to treat an exhibit with a chemical process
1) Matrix
2) Substrate
3) Value
4) Seriousness of Crime
5) Portability
6) Sentimental Value to Owner
Name 2 reasons why you would use dye stain on exhibits treated with CA
1) Enhanced detail
2) Eliminate background
3) Make latent impressions visible
4) Increase contrast with background
5) Reveal impressions that were not visible prior to staining
What wave length of FLS should be used for viewing the dye stain Androx
UV
What wave length of FLS should be used for viewing the dye stain Brilliant Yellow
450-485
What wave length of FLS should be used for viewing the dye stain Rhodamine 6G
505-535
What are the limits in nanometers of the visible light spectrum
400-700 nm
6 proccesses, in order (excluding powders) to develop a fingerprint on a dry piece of paper
1) Visual examination
2) Iodine fuming
3) DFO / Indandione/Zinc
4) Ninhydrin
5) Silver Nitrate
6) Oil Red or Physical Developer
What does Ninhydrin react with
Amino Acids
T/F - In fluorescence photography, the barrier filter is always in front of the light source
False - Excited filter is
What is the recomemded dye stain used to view friction ridge detail developed with CA using the laser
Rhodamine 6G
For general search of a crime scene, what is the optimal wavelength of an alternate light source to us
Blue light - 450nm
What is the recomended examination process for wet glass
Molybdenum disulphide
Moly-di
T/F - When painting with light at night, your camera should be on manual mode
True
Name 2 flash techniques you could use to photograph an outdoor crime scene at night
1) Synchronized flash at camera
2) Flash with slow sync
3) Flash with rear sync
4) Multiple flashes at camera
5) Multiple flashes away from camera
What are the 2 methods of measuring used for a plan drawing
1) Baseline Offset
2) Triangulation
7 pieces of information you should include on a rough sketch of a crime scene
1) Compass direction
2) Name
3) Date/time sketch made
4) Weather/temperature
5) Legend
6) Address of location
7) Reference points used (X/Y, A/B)
Why is it important to have knowledge of various footwear manufacturing processes
1) Recognize potential class characteristics in an impression and understand their value
2) Credibility in Court - Increase weight of evidence
Explain the term Randomly Acquired Characteristics (RAC) as it applies to footwear impression analysis
Occurs when something is:
- randomly added or
- taken away
from the shoe outsole that causes or contributes to making the shoe outsold unique
5 possible opinions following a footwear comparison and evaluation
1) Identification
2) Exclusion
3) Inconclusive
4) Association of class characteristics
5) Higher degree of association
When considering Randomly Acquired Characteristics during footwear comparisons, what 4 aspects of each characteristic should be considered
1) Size
2) Shape
3) Location
4) Orientation
What 3 patterns can be classified into basic bloodstain pattern groups
1) Gravity
2) Spatter
3) Transfer
2 basic premises pf bloodstain pattern Analysis are that bloodstain patterns are _______ and _______.
1) Predictable
2) Reproducible
A video recording should include an overall, midrange and close-up shots of the point of the interest. In order to accomplish this, the proper methodology to use is…
1) walk toward the point of interest
2) film the overall view then stop, move in and re-establish the shot by changing the viewpoint slightly - CORRECT
3) Take advantage of the zoom feature and zoom in from overall to mid-range
T/F - A 360 degree shot is completed in one movement
False!
