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MISSOURI STATE HIGHWAY PATROL
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Firearms

Examination of firearms, ammunition, and expended ammunition components.

Evidence Submitted

Evidence submitted for analysis varies widely in firearm-related cases. Most commonly these include recovered rifles, shotguns, pistols, revolvers, cartridge magazines, and a variety of fired and unfired cartridges. Bullets, bullet fragments, shot wads, shot cups, and other firearms-related evidence are also received from submitting agencies across the state.

Each gun submitted is test fired, and the recovered bullets and cartridge cases are retained for use in further analysis.

Firearms submitted to the laboratory for examination.Ammunition components recovered as evidence.

Comparison and Identification

The foremost question asked in most shooting investigations is whether a questioned firearm was the gun that fired the bullets or cartridge cases recovered. To answer it, the questioned evidence is compared against test-fired bullets and cartridge cases from the submitted firearm.

Using the comparison microscope, the minute individual markings placed on a bullet as it passed down the barrel can be microscopically compared and an identification made.

A bullet being examined under a comparison microscope.

Get in touch

Contact the Crime Laboratory

Office hours are 8:00 AM to 4:30 PM, Monday through Friday.