Impressive evidence
By: Carlos P
What is Impression evidence?
Impression evidence is when one object leaves an impression of its texture on another object. Like leaving a shoe print on dirt or your teeth on a bite mark.
How do you collect impression evidence?
If it is 2D evidence, you can either take a picture of it or lift it with special tape.
If it is 3D evidence, you can either take a picture or cast it with a special kind of cement.
Examples of impression evidence
Tire Tracks
Features to analyze:
Tread pattern
Width and length of tread pattern
Wear patterns or defects
Foot print
Features to analyze:
Tread pattern, size, shape, and depth
Wear patterns
Any defects
Other trace material
Bite mark
Features to analyze:
Type of bite mark
Characteristics of teeth
Color of bruise
Body fluids