Podcast
Questions and Answers
What is the outermost covering of the body?
What is the outermost covering of the body?
Hair
What is the name of the innermost portion of the hair that contains the pigment?
What is the name of the innermost portion of the hair that contains the pigment?
Cortex
What are the three main structural components of the hair?
What are the three main structural components of the hair?
- Cuticle, cortex, and medulla (correct)
- Tip, shaft, and root
- Cuticle, shaft, and root
The cuticle of a hair is scale-like in appearance.
The cuticle of a hair is scale-like in appearance.
Which of the following can be determined from a human hair sample?
Which of the following can be determined from a human hair sample?
A microscopic examination is typically conducted first to determine if the hair sample is of human or animal origin.
A microscopic examination is typically conducted first to determine if the hair sample is of human or animal origin.
What is the specific method used to examine evidence using ultraviolet light?
What is the specific method used to examine evidence using ultraviolet light?
The use of a UV lamp requires a darkroom for proper examination.
The use of a UV lamp requires a darkroom for proper examination.
What is the method used to compare paint specimens in forensic analysis?
What is the method used to compare paint specimens in forensic analysis?
What is the name of the technique used in number restoration that involves the application of a chemical solution?
What is the name of the technique used in number restoration that involves the application of a chemical solution?
Which of the following is a type of number used in serial number analysis?
Which of the following is a type of number used in serial number analysis?
The serial number on an object can be used to identify the manufacturer or origin of the material.
The serial number on an object can be used to identify the manufacturer or origin of the material.
What is the main purpose of a liquor test?
What is the main purpose of a liquor test?
The presence of alcohol in the blood might be considered an aggravating factor in a crime, depending on the circumstances.
The presence of alcohol in the blood might be considered an aggravating factor in a crime, depending on the circumstances.
Flashcards
Hair Composition Analysis
Hair Composition Analysis
Examining hair to determine origin (animal or human), race, body area, removal method, and tool used for cutting or damaging it.
Hair Races (forensics)
Hair Races (forensics)
Determining if human hair is Negroid, Mongolian, or Caucasian.
Hair Removal Method
Hair Removal Method
Identifying whether hair was removed naturally or forcibly (e.g., cut, pulled).
Hair Cutting Tools (determination)
Hair Cutting Tools (determination)
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Hair Age/Sex Determination
Hair Age/Sex Determination
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Ultraviolet (UV) Light Examination
Ultraviolet (UV) Light Examination
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UV Examination Method
UV Examination Method
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Fiber Evidence Examination
Fiber Evidence Examination
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Fiber Comparison
Fiber Comparison
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Fiber Examination Methods
Fiber Examination Methods
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Tape Evidence Examination
Tape Evidence Examination
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Tape Analysis
Tape Analysis
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Paint Examination
Paint Examination
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Macro-etching Method
Macro-etching Method
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Serial Restoration
Serial Restoration
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Chemical Solution
Chemical Solution
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Micro Examination
Micro Examination
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Crime Scene Tape
Crime Scene Tape
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Study Notes
Hair Examination
- Hair covers most body parts, excluding palms and soles
- Microscopic examination determines if hair is human or animal
- If human, the race, body area, removal method (natural/forced), cutting tool (dull/sharp/crushed/burned), and potential age and sex can be determined.
Structural Parts of Hair
- Inner Aspect
- Cuticle: outermost, scale-like layer
- Cortex: inner layer containing pigment
- Medulla: central canal
- Outer Aspect
- Tip: distal end
- Shaft: portion above skull
- Root: embedded in skin
Ultraviolet Examination
- UV light (wavelengths 10-400 nm)
- Used in scientific examination of evidence
- A darkroom and UV lamp are necessary
- Examines garments and other items
Fiber Examination
- Examines color, composition, and construction
- Compared to known fibers for similarities
- Use microscopy, micro-chemical tests (solubility), and melting point tests to determine uniqueness
Tape Examination
- Matches tape fragments from a crime scene to suspect's possession
- Explores composition, color, diameter
Macro-etching Examination
- Acid-etching method for restoring numbers
- Used on metal surfaces
- Chemicals used: different solutions based on metal type (iron/steel, aluminum, lead)
- Examines stamped/engraved/embossed numbers
Number Restoration
- Molecular disturbance is stamped
- Visible metal portion of the number is erased
- Preliminary examination: location of serial number, remove grease and oil, clean, and photograph
Liquor Test
- Purpose: determines intoxication by ethyl alcohol level
- Laboratory: quantitative examination of ethyl alcohol in blood determines alcohol quantity.
- Significance: Intoxication is considered as aggravating or mitigating circumstances, depending on the habitual nature and intentional or subsequent events,
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