What is meant by impression evidence?

Impression evidence refers to physical impressions left by an object or material that directly contact a surface, which retains the characteristics of that object. This can include shoe prints, tire tread marks, tool marks, or even finger or lip impressions. Because impression evidence captures unique features of an object at the microscopic level, it can be critical for linking a suspect to a crime scene or corroborating witness statements.

The uniqueness of the impression allows investigators to form associations between the evidence found at a crime scene and specific objects or individuals, enhancing the reliability of the findings. Unlike fabricating evidence, impression evidence is rooted in tangible physical contact, making it a significant type of forensic evidence used in criminal investigations.