Case studies
History of Hair Analysis
Functions of Hair
Chemical Testing With Hair
Animal v. Human Hair
100
Reddish blonde pigment, length of the hair implying it had come from a female, concentration of the pigment which suggested the hair belonged to a younger woman.
What characteristics of the hair found in Ross's home indicated that it belonged to Alma Tirtsche?
100
1934
In what year was the first comparison microscope made?
100
To regulate body tempuature
What is the primary function of hair on mammals?
100
Anything your body ingests of absorbs such as: food, water, drugs, & even toxic substances.
What substances can end up in your hair?
100
0.33 or less
How big is the index of a human medulla?
200
Neutron Activation Analysis
In the case of Gaetane Bouchard what radiological process was used to test the hair?
200
Dr. Sydney Smith
Who made the first comparison microscope?
200
Protects against sunlight, decreases friction, & acts as a sense organ.
What are some minor functions of hair?
200
The method of dissolving the hair in an organic solvent
What is one method used to identify drugs or toxins that can be found in ones hair?
200
In animals the pigmentation is denser towards the medulla, pigments are found in solid masses
Whats the difference in the pattern of pigmentation in animals?
300
A ratio of Sulfur to Phosphorus
In the case of Gaetane Bouchard what element found in the hair reveled it was in closer relation to the suspect than to the victim?
300
1910, French forensic scientists Victor Balthazard & Marcelle Lambert
In what year was the first comprehensive study of animal hair completed? Who took part in this comprehensive study?
300
If the outside temperature is cold, these muscles pull the hair strands upright, creating pockets that trap air. This trapped air provides a warm insulating layer next to the skin
How does hair work in association with muscles in the skin to regulate body temperature when the outside temperature is cold?
300
Their travels, diet, drug intake, & toxin exposure
What can analysts tell from the chemical & radiological analysis of hair?
300
It is denser toward the cuticle
What is the pattern of pigmentation like in animals?
400
The color & structure of the hair found in a bundle of clothes left on the road
In the case of Eva Shoen, what evidence was Marquis presented with before confessing?
400
"Le Poil de I'Homme et des Animaux (The Hair of Man and Animals)
What was the name of the first comprehensive case study on animal hair?
400
If the tempurature outside is warm, the muscles relax & the hair becomes flattened against the body releasing the trapped air.
How does hair work in association with muscles in the skin to regulate body temperature when the outside temperature is warm?
400
With this it is possible to tell where in the United States a person has been living.
What can an analyst tell by examining the oxygen & hydrogen isotopes in a persons body tissue?
400
0.50 or greater
How big is the medullary index of cattle hair?
500
The irregular ends of the hair
What characteristic implied that the hair had been ripped off instead of cut off?
500
The late 1800's
When did scientists acknowledge the importance of hair analysis as trace evidence in criminal investigations?
500
5 million hair follicles, 2 percent
How many hair follicles does a human have when born? What percent of that hair is on the head?
500
The Mitochondrial DNA
What DNA can be used if the sample doesn't contain a follicle?
500
Rodents have a coronal cuticle with scales that look like a stack of crowns, human cuticles are flat & narrow
Whats the difference between an animal & a human cuticle?
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