Firearms Evidence and Cartridge Components

Physical evidence from firearms like bullets, cartridges, and residue, used in criminal investigations.

The parts of a cartridge: case, primer, propellant (powder), and projectile (bullet).

Cartridge where the primer is located around the rim of the cartridge case.

Cartridge with the primer in the center of the cartridge case.

Marks on a cartridge case identifying the manufacturer and type.

Barrel with grooves and lands creating spin on a projectile for accuracy.

Features of a firearm that group it with similar models.

The diameter of a firearm barrel (expressed in inches/mm).

Features of fired bullets indicating barrel rifling patterns.

Spent cartridge cases that exhibit marks from the firing process.

Material from a discharged firearm, often found on the shooter.

Techniques like NAA, AA, and SEM/EDX to identify gunshot residue components.

Keep weapons found in water submerged to prevent rapid rust.

Use special boxes for safe transport of loaded handguns.

Mark cylinder positions and package each cartridge separately.

Point down, release magazine, pull slide to unload chamber.

Bullets lodged in objects; sketch location, carefully remove and package.

Sketch and measure position of each case and package individually.

Document firearm details, sketch scene, photograph before moving.

Process hands quickly; avoid washing before sampling.

Use metal discs for collection, pressing on hands and sealing.

Use swabs soaked in acid; avoid plastic to avoid sweat.

Physical evidence related to firearms, commonly found in violent crimes and other offenses.

The parts of a cartridge: case, primer, propellant, and projectile.

Cartridge with priming compound around the rim.

Cartridge with a central primer.

Mark on a cartridge case identifying manufacturer and type.

Barrel with grooves and lands for bullet spin.

Features of a firearm that establish a family (make/model).

Bore diameter of a firearm, measured in inches.

Marks from the barrel's rifling on the bullet.

Cartridge case with marks from the firearm's parts.

Substances from a discharged firearm, often on the shooter.

Techniques to analyze gunshot residue, including NAA, AA, and SEM/EDX.

Process of collecting GSR from individuals' hands.

Procedure for safely removing ammunition from a revolver.

Procedure for safely removing ammunition from an automatic firearm.

Storing and handling firearms found in water to avoid rust.

Safe transport methods for firearms, with special considerations for loaded handguns.

Safe transport methods for unloaded firearms, using packaging.

Methods for recovering bullets embedded in objects or persons.

Procedure for collecting fired cartridge cases from a crime scene.

Using metal discs to collect GSR for analysis.

Using swabs to collect GSR for analysis.

Documentation process for firearms and ammunition evidence.

Physical evidence related to firearms, including fired cartridges, gunshot residue, and discharge residues.

The parts of a cartridge, including the cartridge case, primer, propellant, and bullet.

Cartridge with the primer located on the rim of the cartridge case.

Cartridge with the primer located centrally within the cartridge case.

Mark on a cartridge case identifying the manufacturer and type.

Barrel with grooves (lands & grooves) that spin the bullet.

Weapon without rifling, like a shotgun.

General features of a firearm that identify a family of guns.

Bore diameter, often measured in hundredths or thousandths of an inch.

Marks left on a bullet from the barrel's rifling.

Physical evidence from the spent cartridge.

Forensic analyses of firearms evidence.

Substances from a discharged firearm, often on hands and near target.

Techniques for identifying GSR components.

Methods for collecting gunshot residue from living or dead subjects.

Procedure for safely removing ammunition from a revolver.

Procedure for safely removing ammunition from semi-automatic firearms.

Procedure for collecting firearms found in water.

Safe methods of delivering firearms to the laboratory.

Methods for collecting various components of fired ammunition.

Safe and detailed methods for handling firearms as forensic evidence.

Methods for documenting and marking firearms evidence correctly.

Physical evidence related to firearms, including fired and unfired cartridges, gunshot residue, and discharge residues.

The parts of a cartridge: cartridge case, primer, propellant, and projectile (bullet).

Cartridge with priming compound around the rim.

Cartridge with priming compound in the center.

Mark on a cartridge case identifying manufacturer and type of cartridge.

Bore diameter of a firearm barrel, usually in inches.

Barrel with grooves and lands. Improves bullet accuracy.

Features of a firearm determining family (make/model).

Properties of fired bullets due to barrel rifling.

Cartridges after firing bearing marks (breechface, ejector).

Substances from primer and powder after a gunshot.

Estimating the distance between gun and target from gunshot traces.

Testing the firearm's proper operation.

The path a bullet takes after firing.

Determining the order bullets were fired.

Procedure for safely unloading a revolver.

Procedure for safely unloading a semi-automatic.

Techniques for identifying and analyzing gunshot residue.

Methods to collect and handle gunshot residue.

Used to collect gunshot residue for analysis before swabbing.

Used to collect gunshot residue for analysis after using metal discs.

Documenting firearm location, state, and identification.

Procedures for recovery of firearms submerged in water.

Procedures for safely transporting firearms to lab.

Physical evidence from firearms, including cartridges, residue, and discharged items (bullets, casings) related to crimes.

The parts of a cartridge: cartridge case, primer, propellant (gunpowder), and bullet/projectile.

Cartridge with primer around the rim.

Cartridge with a central primer.

Marking identifying the cartridge manufacturer and type.

Straight, tapered, and bottlenecked.

Barrel with lands and grooves that spin the bullet for accuracy.

Weapon with smooth barrel, like a shotgun.

General features of a firearm (caliber, lands/grooves) used to group similar weapons.

Bore diameter, measured in inches.

Marks on a bullet from a gun's barrel.

Cartridge case showing marks from firing process.

Traces of gun discharge material.

Techniques like NAA, AA, and SEM/EDX for identifying GSR.

Collect GSR from hands, preserve it to avoid contamination.

Method for safely removing ammunition from revolvers.

Method for safely removing ammunition from automatic firearms.

Collecting firearms from water, keeping them submerged.

Safety guidelines for transporting firearms to labs.

Documenting firearm condition, location.

Visual representation of fired ammo components’ locations.

Collection method for gunshot residue from various surfaces.

Analysis of firearm evidence in the lab.

Physical evidence related to firearms, including fired and unfired cartridges, residue, and discharged firearms, commonly found in violent crimes.

The parts of a cartridge: cartridge case, primer, gunpowder, and projectile.

Cartridge with priming compound around the rim.

Cartridge with a central primer.

Marking on the cartridge that identifies the manufacturer.

Straight, tapered, and bottlenecked.

Barrel with lands and grooves that spin the bullet.

Features like caliber and rifling that group firearms together.

Bore diameter, measured in inches.

Features like caliber, and rifling impressions on the bullet.

Recovered cartridge cases showing marks from the firing mechanism.

Firearm analysis, distance assessment, residue identification, and firing sequence determination.

Material from a firearm's discharge, can be found on shooter or targets

Proper handling and documentation of firearms and ammunition for evidence purposes

Procedure for safely removing ammunition from a revolver.

Procedure for safely removing ammunition from a semi-automatic firearm.

Collecting firearms and evidence from water, maintaining proper water level.

Transport method for firearms, safe and secure transport, unloaded when shipping.

Methods for collecting embedded bullets, cartridge cases, and shot wads from targets or bodies.

Techniques used to analyze gunshot residue, including NAA, AA, and SEM/EDX.

Sampling methods for gathering gunshot residue from a person's hands or other areas.

Used to collect GSR for atomic absorption analysis, pressed onto the hands.

Used to collect GSR for analysis, applying with nitric acid.