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Unloading gun. Forensic officer making a gun safe for transport by removing the magazine. Careful handling is required to preserve any fingerprints that may be present on the gun or magazine. The gloves prevent any addition of new fingerprints. Test-firing of this gun will allow it to be linked to bullets and cartridge shells found at the crime scene. (KEYSTONE/SCIENCE PHOTO LIBRARY/MAURO FERMARIELLO)