Evidence
Testimony from someone who actually witnessed a crime being committed is this type of evidence.
What is direct evidence?
This first step in processing a crime scene involves the police doing this.
What is securing the scene?
The outermost layer of a hair shaft, made of overlapping scales.
What is the cuticle?
Cotton, wool, and silk belong to this broad category of fibers.
What are natural fibers?
An eyewitness account of a crime being committed is an example of what kind of evidence?
Direct evidence
Evidence that suggests a fact through inference rather than proving it through direct observation.
What is circumstantial evidence?
Investigators keep witnesses apart primarily to prevent this.
What is influencing or contaminating one another's testimony?
The innermost region of a hair shaft, which may be continuous, interrupted, fragmented, or absent.
What is the medulla?
Nylon and polyester belong to this category of manufactured fibers.
What are synthetic fibers?
Eye-witnesses can have,a high amount of this and still be wrong.
What is confidence?
A blood type shared by millions of people is an example of this classification of evidence.
What is class evidence?
When examining a crime scene for evidence, investigators use one of these patterns.
Investigators use a spiral, grid, linear, or quadrant.
This is the medullary index.
What is the numerical measurement compares the width of a hair's medulla with the width of the entire hair shaft.
Two fibers have the same color, composition, and microscopic characteristics. Investigators generally cannot conclude that they came from the same exact garment because fiber comparisons usually provide this type of identification.
What is class identification?
Poor lighting, distractions, and incomplete visual information introduce this kind of interference into perception.
What is visual noise?
A fingerprint with sufficient distinctive detail may be considered this type of evidence.
What is individual evidence?
This principle states that contact between people and objects can result in the transfer of material.
What is Locard's Exchange Principle?
What is DNA from the follicle?
This tool can be used to visually compare fiber samples.
What is a comparison microscope?
When the brain fills gaps in incomplete memories using expectations or assumptions, this cognitive influence can distort recollection.
What is bias?
Tiny materials such as soil particles, hair, and paint chips belong to this category.
What is trace evidence?
This folded paper container is used to hold small pieces of dry trace evidence before they are placed in an evidence bag.
What is a paper bindle?
Human hair grows at approximately this rate.
What is 10 mm/ month?
These are examples of quantitative tests on fibers.
What are microscopic observation, chemical reaction, flame test, and fluorescence?
This person's job is to examine a corpse and determine the time and cause of death.
What is the medical examiner?
A witness sees someone enter a building shortly before an item disappears but never sees the theft. This is the classification of the witness's testimony about the suspected theft.
What is circumstantial evidence?
This record documents who collected, handled, transferred, and examined evidence throughout an investigation.
What is the chain of custody?
This method can be used to separate chemicals in hair to establish their quantities.
What is gas chromatography?
These kinds of tests should be done last on fibers.
What are destructive tests?
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Fun facts about hair, fibers, textiles, securing crime scenes, documenting crime scenes
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