Ambient Light – Light that occurs naturally (sunlight, moonlight, etc.).
Angle of Impact – The angle at which a blood drop strikes a surface.
Associative evidence – Evidence that links a person or an item to the scene of a crime.
Ballistics – Study of the motion of projectiles, such as the motion/travel of bullets from the time they leave a firearm until they strike a target.
Binary Explosive – Two chemicals/material/compounds which are not explosive until they are mixed.
Bubble Ring – An outline within a bloodstain caused by air in the blood.
Cartridge – An unfired round of ammunition.
Chain of custody – ensuring evidence is safe and trackable at all times.
Double Base – Smokeless powder containing both nitroglycerine and nitrocellulose.
DOT number − Department of Transportation serial number assigned to every tire sold in the U.S. The ID also provides information regarding the manufacturer, date of manufacture, and tire size.
Furrow – A valley or depression between fingerprint friction ridges.
Homogenization – preparing tissue for analysis by grinding it in water.
Ion mobility spectrometer (IMS) – Handheld chemical detection device used to identify blast material at a bombing site.
Latent − A fingerprint that’s not visible to the naked eye.
Lift − Recovering fingerprints from a crime scene.
Locard’s Exchange Principle – the theory that every person who enters or exits an area deposits and/or removes physical material from the scene.
Loupe – magnifier used for examining fingerprint details.
Magazine – A container for cartridges. Magazines feature a spring to feed individual cartridges into the chamber of a firearm.
Medico-legal death investigation (MDLI) – A medical investigation conducted by trained forensic medical practitioners for the purpose of determining the cause and manner of death.
Plastic Bonded Explosives (PBX) – A high explosive in a pliable plastic form, such s C4.
Post-mortem redistribution – Toxicological phenomenon where drug concentration increases after death.
Report – A loud sound produced by an explosion, such as a gunshot.
Rifling – Grooves carved/imprinted in the interior of a gun barrel. Grooves/rifling cause bullets to spin, an action needed for accuracy and to aid in the flight of the round.
Toxicity – the biological effect of a substance.
Trace evidence – Small quantities of physical evidence.
- Three classifications of fibers: 1) Natural (animal or plant fibers). 2) Synthetic (manmade materials such as polyester). 3) Manufactured (made from natural materials that are reorganized to create fibers, such as rayon).