What is impression evidence?
Impression evidence can be defined as objects or materials that have retained the characteristics of other objects through direct contact. Impressions are created when one object is pressed against another material with enough force to leave an impression of the object.
Shoe prints, tool marks, tire tracks, bite marks, and marks on a fired bullet are several examples of impression evidence.
Impressions may be found in or on many different types of materials. The quality of the impression depends on the object making the impression and the surface conditions, such as how hard or soft it is and what type of material it is (soil, mud, dust, concrete, grass, skin, etc.)