Fabric impressions are the transference of a fabric’s construction pattern to the surface of another material. We often see fabric impressions in cases such as vehicular hit and run, homicide, sexual assault or burglary. Impressions can occur from the addition of a substrate, removal of material, and/or a material being embedded.
Fabric impression examinations consist of comparing a questioned impression to fabric standards to determine if any associations, eliminations or positive identifications can be made between the two.
Questioned Impression on Suspect’s Bumper Known Pair of Victim’s Jeans
When submitting evidence a fabric standard should be submitted at the same time as the impression.
Evidence can be submitted in the form of:
Original Item-should be packaged to protect impression
Lifts are acceptable
Photographs are acceptable, but only with a scale
Cast impressions are acceptable