Module 3: Physical Evidence Flashcards
Physical Evidence
Tangible objects
- Weapons
- Hair
- Blood
- Fibers
- Fingerprints
Documentary Evidence
Any type of written or recorded evidence
- Phone Calls
- Recording of Crime by video
Demonstrative Evidence
Evidence that is used to help recreate or illustrate a crime
-Model of crime scene for court trials
Testimony
Evidence given by a witness during a trial.
Identification
The process of determining the chemical or physical characteristics of a piece of evidence. (With as much certainty as possible.
Comparison
The process of testing a suspect sample with a known sample to prove if they have a common origin.
Probability
The frequency of an event
Individual Characteristics
Evidence with characteristics that can be traced back to an individual item or person.
- Fingerprints
- Shoe Patterns/Treads and Wear
- Blood
- Semen Samples
- Firearm markings
- Markings on a Fired Cartridge
Ridge Characteristics/ Minutiae
Ridge endings, enclosures, and other details that make up a fingerprint
Class Characteristics
Characteristics that can only be associated with a group and not a single source
Physical Properties
Describes a substance or object without referring to another substance
Chemical Properties
Describes what happens when a substance reacts with another substance
Radial Fractures
Fractures that extend outward from the point of impact
-Spokes on a wheel
Concentric Fractures
Fractures that form a circle around the point of impact
-Occurs after a Radial Fracture
Soil
Surface Material from earth
- Natural
- Artificial