Now that you have educated the new investigator on the concepts of class and individual characteristics of evidence, it is time to begin collecting the evidence that you had marked during the initial walk-through. In this assignment, you address the actual collection and preservation tasks used during the investigation.

There are numerous examples of physical and trace evidence, and although general crime scene procedures will be the same, the type of evidence will determine the specific collection procedure. Below is a list of many types of evidence that may be found at a crime scene.

Computers
Documents
Drugs
Explosives
Fibers
Fingerprints
Firearms
Glass
Impressions
Paint
Petroleum products
Plastics
Powder residues
Serial numbers
Soils and minerals
Tool marks
Vehicles and lights
Woods and vegetative materials