Week 4 Flashcards
SWGTREAD
Scientific working group on shoe print and tire tread evidence
3 types of prints
Visible (human eye)
Plastic (3D impression)
Latent (not visible to human eye)
IAI
International association for identification
** certified footwear but not tire track**
Attempted to destroy fingerprints
Dillinger
Scientific crime detection laboratory writer who has at hand the prints of Dillinger both before and after their partial obliteration
Mr. Charles M. Wilson
Studied prints of “Gus” Winkler another who tried to destroy identification value of prints
Mr. Al Dunlap
Efforts towards defacement of patterns were least effectual of all
Jack Klutas
“Casual” graft of ridged skin (1986)
Galton
Plastic surgeon (intentioned transplanting)
Updegraff
“Imperfect” prints
Faulds
Not a single analytical tool but multitude of tools properties, crystallography, chemical microscopy, dispersion staining,etc.
Microscopy
Established rules for observations with a microscope
Henry Baker
Established manageable set of general rules for analysis
Ex: broken ceramic dish used as glass cutter
Anton Alexander Benedetti- Pichler
The symbol of science
Microscope
Developed compound microscope
Jansen brothers & Galileo
N = c/cm
Speed of light = 299,792,458 m/s
Refractive index
3 modes of fracture
Tension - opening
In-plane shear -tearing
Anti-plane shear - sliding
Two transfers
Located Exchange Principle
Transfer Methods - physical, spatial
Microanalysis
The detection and analysis of very tiny but concentrated substances
Trace Analysis
The detection and identification of tiny amounts of one substance dispersed in a larger different substance
PLM
Polarized light microscope
Hairs
Animal (non human)
Identification
Fibers
Natural
Manufactured
Paint
Automotive
Architectural
Other
Glass
Physical comparison
Physical properties
Soil
Rare to find in suburban/urban crimes
