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Forensic Science II

Physical Evidence

QuestionAnswer
Who said, "Every contact leaves a trace" Edmond Locard
The site of the first crime lab Lyon, France
Similarities between two samples, such as the color, number of layers, chemical composition, or a physical match between the edges Paint
Determine its color, surface characteristics, tint, thickness, density, chemical composition, and refractive index Glass
Traces found on a suspect’s clothing, skin, hair Explosives
Characteristics of ammunition, firearms, and residue Ballistics
Gunshot residue abbreviation GSR
Integrated Ballistics Identification System abbreviation IBIS
Reveals where a person has traveled and may be picked up at a crime scene or left behind Dust and Dirt
Examine the samples for chemical composition, pollen, plant material, and other organic matter Dust and Dirt
Can never remember to bring CSI CDs Mitch
Arches, loops, whorls Fingerprints
AFIS Automated Fingerprint Identification System
Evidence can be photographed, lifted with tape, or cast with plaster Impression evidence
Each of the 32 teeth in humans is unique due to age and wear Bite Marks
Tiny nicks and chips form on the edges Tool Marks
When an object broken, torn, or cut, two unique edges are formed Fracture Matches
Investigators may also be able to determine the weapon's size, shape, and length Wounds
Unique features, such as watermarks on stationary or indentations made as someone wrote on a page in a notebook Questioned documents
Flies, beetles, and other insects can provide useful clues about a corpse Entomologist
Investigators can extract this from almost any tissue, including hair, fingernails, bones, teeth and body fluids DNA
CODIS Combined DNA Index System
Analyze skeletal remains Forensic anthropologists
Blood, semen, saliva, sweat, and urine Body fluids
Transferred from the suspect or the suspect’s clothes to the victims’ and vice versa Hairs & Fibers
Created by: mpringle
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