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How do crime scene investigators use the TrAc Finder and filters during an investigation?

April 26, 2017crime filters finder gauge investigation investigators scene thickness trac ultrasonic

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How do crime scene investigators use the TrAc Finder and filters during an investigation?

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The TrAc Finder was designed to be easy to use. The filters can easily be snapped in place on the front of the lamp and are interchangeable. Knowing which filters to use and when, however is not an exact science. The investigator often acquires this knowledge through years of experience. This is because no two crime scenes are ever identical and the state and condition of material, substances and traces can vary.