If the tool cannot be linked to a suspect through one of these methods, the evidence will not be accepted. The tool must be able to be linked to a suspect through possession, latent prints, or DNA. The Firearms (& Tool Marks) Department examines tools and microscopically compares tool marks from a crime scene to test specimens produced by a recovered tool to see if the tool was used in the crime. The Department also performs serial number restoration and other discipline related examinations. Similarly, fired ammunition components recovered from one crime scene can be microscopically compared with fired ammunition components from other crime scenes to determine if a single firearm was responsible for both shootings. The Department also examines and microscopically compares fired ammunition components (projectiles, cartridge cases, shotshells, etc.) recovered from a crime scene to test specimens fired from a firearm recovered from a suspect to determine if the firearm was used in the shooting. capability for full auto fire, barrel length, and/or overall length). The Firearms Department examines firearms to test their operability and also their compliance with various statutory regulations (ex.
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