* The type of weapon that fired a particular bullet or cartridge case

* Whether a bullet was, or could have been, fired from a specific weapon

* Whether a cartridge case was, or could have been, fired in a specific weapon

* Whether a tool found in a suspect's possession was, or could have been, used to cut, scrape, pry, or pinch evidence seized from a crime scene

* The original serial number of a weapon or other metal object after the number has been obliterated

* If gunpowder is present on a victim's clothing or on other evidence that may have been the target of the suspect

* The distance from the muzzle of the firearm to the target at the time the weapon was fired

* If any elements are present in a properly prepared Gunshot Residue Kit that could be associated with the firing of a weapon

* If fingernail clippings or fragments found at a scene can be identified as having come from a specific person

* If a lamp was on or off at the time of an accident by examining the condition of the filament