The key steps in securing and identifying both physical and biological evidence at a crime scene is keeping the scene from being contaminated until evidence can be documented and properly collected. Future prosecution of the case may hang on the bases of how and when the evidence was collected. Optical microscope is one type of equipment or techniques that can be used to identify biological evidence? The optical microscope, often referred to as light microscope, is a type of microscope which uses visible light and a system of lenses to magnify images of small samples, like hair. An example of a physical item of evidence is a wallet. It can be linked to a specific suspect because of several reason. First is in a wallet there will be several
