What type of evidence are footprints classified as?

Footprints are classified as impression evidence because they are created when an object leaves a mark or an imprint in a substance, such as dirt, snow, or other soft surfaces. This type of evidence provides valuable information related to the size, shape, and tread pattern of the footwear, which can be linked to specific individuals or types of shoes.

Impression evidence is critical in forensic investigations as it can help establish a suspect's presence at a crime scene or connect them to particular activities. In contrast, biological evidence refers to any substance derived from living organisms, trace evidence involves small materials that are transferred during a crime (like hair or fibers), and physical evidence encompasses a broader category that includes all tangible items relevant to a crime. Understanding the classification of evidence helps forensic professionals in collecting and analyzing information effectively during investigations.