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  • Title: Tire Classification by Elemental Signatures Using Laser-Induced Breakdown Spectroscopy.
    Author: Lucchi J, Gluck D, Rials S, Tang L, Baudelet M.
    Journal: Appl Spectrosc; 2021 Jun; 75(6):747-752. PubMed ID: 33543647.
    Abstract:
    Tire evidence is a form of trace evidence that is often overlooked in today's forensics, while frequently found at crime or accident scenes, usually in the form of skid marks. The pattern of the tire skid mark has been used before to link a tire or car to a scene, but the widespread use of anti-lock braking systems makes this an almost impossible and abandoned route of analysis. With this in mind, using the chemical profile of a tire has potential to link a car or tire back to a scene in which its trace material is found. This study shows the successful use of the elemental profile of tire rubber to classify 32 different samples using laser-induced breakdown spectroscopy, analyzed by principal component analysis combined with linear discriminant analysis. A classification accuracy close to 99% shows the ever-growing use of laser-induced breakdown spectroscopy as a technique of choice for forensic analysis of tire rubber, opening the path for its use as a forensic evidence.
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