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Ch 4 Terms Investigations
Terms in this set (21)
The diameter of a gun barrel's interior between its opposing high sides.
The diameter of a bullet; somewhat larger than the bore of the weapon from which the bullet is fired.
Characteristics of physical evidence that are common to a group of objects or persons.
Made when the case is kicked out of the firearm.
Evidence that has been exposed to other evidence which may taint testing results. This evidence would have to be excluded from trial.
Made when the case is pulled out of the chamber.
The alignment of the edges of two items of evidence, thereby showing that both items were previously joined together.
Patterns formed by the ridge detail of fingerprints; primarily loops, whorls, and arches.
In a firearm's rifled bore, the low cuts that separate the higher lands.
A reagent used in preliminary or presumptive field tests to check for the presence of blood.
Characteristics of physical evidence that can be identified as coming from a particular person or source.
Standard or reference samples from known or verifiable sources.
Fingerprints created when friction ridges deposit body perspiration and oil on surfaces they touch; typically invisible to the naked eye.
A water-based spray which locates trace amounts of blood within 30 seconds, creating a blue glow after the lights are turned out.
The characteristics of friction ridges on palms, fingers, toes, and soles of the feet.
Prints created when fingers contaminated with blood, face powder, or a similar material touch a clean surface.
Radial fracture lines
Lines that move away from the point of impact in a glass window.
These prints are formed when the soles of the footwear, soles of feet, and times are contaminated with foreign matter such as blood or dust and leave a print on a firm base.
The lands and grooves in the rifled bore of a firearm.
(1) Recovered crime scene samples whose sources are in question; (2) questioned evidence that may have been transferred to an offender during the commission of a crime and may have been taken away by him or her; (3) questioned evidence recovered at multiple crime scenes that associates a particular tool, weapon, or person with each scene.
Any impression, cut, gouge, or abrasion made when a tool comes in contact with another object.
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