Definitions
What do I mean by observation?
information gathered through our senses (see, smell, touch, taste, hear)
What are the 4 types of fingerprints?
arch
whorl
loop
composite
Shoeprints are classified by?
size, pattern of the print, wear of the pattern
Classifying tire tracks
classified based on:
type of tread
size of tread
wear of tread
Do permanent inks separate?
will not separate in water
What is the definition of inferences?
are a conclusion about something based on an observation
Describe the arch fingerprint
goes from one side of the finger to the other
How to identity specific wear patterns?
look for wear on the heel, on the toes and the wear on the treads
How do we classify fibers and fabrics?
colour of weave
texture
strength
flammability
Do no-permanent inks separate?
Yes, they separate in water
What is Graphology?
is the analysis of the physical characteristics and patterns of handwriting claiming to be able to identify the writer/suspect
How can fingerprints be lifted of regular surfaces?
using powders, brushes and tape
Why do investigators check the tread on a shoeprint?
can give investigators an idea of what type of shoe it is
eg. hiking shoe - lots of deep treads
eg. dress shoe - no tread
How do we classify soil samples?
colour
pH
smell
make up (composition)
size of particles
Prediction
A foretelling of what might be expected
Chromatography
to compare sample of ink by separating them into the colors that they are made up of
What is a Loop fingerprint?
begins at one side of the finger, loops around the ridge ends at the same side of the finger that it began.
What do running shoeprints indicate?
large space between prints
deeper prints
outline may not be as clear (dirt kicked up)
line of prints are straighter - not as parallel
How do we classify handwriting?
the loops in the letters
the crosses on the t
the spaces between the letters and the words
the slant of the letters
the size of the letters
the dotting of letter (i, j)
a combination of writing and printing
the pressure on the page
What is the tendency of liquid to be drawn upward?
Capillary action
Define dactylograms
is the study of fingerprint identification
Fingerprints can only be matched if...
They have a suspect to compare samples to or if the suspect has fingerprints in a database
Walking shoeprints indicate?
smaller spaces between prints
shallower prints
outline clearer
less of a straight line - more parallel
What do we call synthetic fabrics?
man-made
Investigation
A careful study of something in order to discover the facts about it.