Blank Tire Track Challenge Sheet 2. As with other traces such as fingerprints or This is a video describing the procedure for taking tire track imprints/impressions in our Forensics Laboratory Investigation. There are many different types of evidence that can be catalogued and used in the pursuit of criminals. Matchbox or Hot Wheels cars 3. As well as fingerprints and physical evidence such as bodily fluids and definitive eyewitness testimony; there are such things as bloodstains, tyre tracks and soil samples that can also be used. Hammond, Ind. Collection Methods There are four main methods of collecting evidence of shoeprint, footprint, or tire track: 1. Footwear and tire tracks at a crime scene are a form of pattern evidence that can be documented, collected, preserved, and evaluated by a forensic footwear or tire tread examiner. Shoeprint and Tire Track Collection Guide Shoeprint Impression Collection Proper collection and photographs of footwear and tire evidence is essential to capture the detail observed in the field. Ink Pad (There are only 3, so you will have to share) 4. Evidence off of the roadway such as tire tracks and skid marks on the shoulder also gets disturbed due to new vegetative growth and mowing. Identifications are largely subjective and are based on the examiner's experience." If properly collected the tire tread impression is extremely valuable in proving a suspect vehicle was present at a crime scene. Basic information of Tire Marks Tire tracks are the impressions left by tires on the surface onto which a vehicle drove. Removal If possible, the object on which the impression is found may be entirely removed (e.g., by removing a piece of flooring). Footwear and tire impressions are perhaps the most overlooked evidence at a crime scene. Improper collection and/or photographic techniques have a direct effect on the analysis in the Materials: 1. Scott Olson/ Getty Images Although impression evidence is extremely fragile, if left undisturbed it can remain for long periods of time. Tire track evidence can: Tire Track Evidence Lab Directions: Your group’s job will be to identify tire tracks and match them to the vehicles provided. If the surface is hard, such as road pavement, the tire might still leave a trace, if dirt or dust was present. If a tire leaves rubber residues on the surface, as is the case with skid marks, crime scene investigators can collect these traces and compare them with the tires from a suspected vehicle. Tire impressions reflect the tread design and dimensional features of the individual tires on a vehicle. 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