CHAP 5 Flashcards
-is one of the oldest forms of physical evidence.
HAIR
-Its use is older than fingerprints.
HAIR
-Like fiber it is mostly likely to be involved in contact between the victim and the suspect.
HAIR
-It is valuable because _______ of each kind of animal is different and distinct for all others.
HAIR
-Most crimes cause contact between one person and another and there may be transfer of __________ from the victim to the criminal and vice – versa.
fibers and hairs
The successful investigation of crimes of violence such as rape, murder, assault, kidnapping, hit and run, etc. are frequently materially assisted by the result of the examination of the _____
hairs and fibers.
are very resistant to decomposition and putrefaction thus they often remain as a means of identification long after others such as facial and fingerprints have been destroyed.
HAIR
become the first person to do an in-depth study of hair.
RUDOLPH VIRCHOW
The use of ______ as means of positive identification is more uncertain and indeed no expert in his right mind/senses will venture to give a definite statement as to individual origin of _____
hair
When was the First used as physical evidence.
1847
What yr did Rudolph Virchow study the hair?
1897
When did HUGO MARX wrote a paper on the use of hair in forensic investigation to determine identity.
1906
wrote a paper on the use of hair in forensic investigation to determine identity.
HUGO MARX
______________ works on new ways to improve the use of hair in forensic investigations.
DR. PAUL KIRK
What year DR. PAUL KIRK works on new ways to improve the use of hair in forensic investigations.
1931
Complete search at the crime scene must be done. Use ____
vacuum cleaner.
____________ at the crime scene must be done. Use vacuum cleaner.
Complete search
All of the hair in the questioned specimens should be submitted but _____ hairs at different places.
do not mix
Search for and collection of hair evidence should ________. _________ is easily transferred to and from the crime scene.
begin as soon as possible
Hair evidence
is easily transferred to and from the crime scene.
Hair evidence
– collect hairs and fibers in mass from carpet, bedding, etc.
Special filtered vacuum cleaner
Collection should be done by:
a. Hand if the location of the hair is important
b. Lint rollers
c. Special filtered vacuum cleaner
If the evidence is stick to another object, the entire object should be _______
packaged and labeled
_________ of hair from the victim as well as the suspect should be obtained if possible.
Representative samples
If lint rollers are used, the entire surface used should be packed into a _______
polyethylene storage bag
In _______ cases, obtain the clothing of the victim from the hospital or morgue to avoid the loss of evidence by careless handling and to prevent the clothing from being destroyed.
vicious assault and murder
To be a representative head hair samples from a particular individual it should consist of __________ hairs from different areas of the scalp and preferably full – length hair.
at least a dozen
Take from all pertinent regions of the body:
a. 50 head hairs
b. 24 pubic hairs (Corpuz, 2015)
Root ____ is preferable
still intact
______ known samples of hair from different parts of the body.
Don’t mix
_________ should be looked for in the following: clothing, combs, weapons, pockets, fingers, hat and etc.
Hair evidence
Get samples from both _____ (Dead body: Head hair and pubic hair). It should be taken before it is buried
victim and suspect
Get samples from both victim and suspect (Dead body: ___________). It should be taken before it is buried.
Head hair and pubic hair
Best way to collect hair is by
combing.
Hair evidence should be packaged into?
paper packets.
The hairs should be placed in a folded paper or in a white mailing envelope, but the corners of the envelope should be sealed with _______
scotch tape.
The hairs should be placed in a ___________, but the corners of the envelope should be sealed with scotch tape.
folded paper or in a white mailing envelope
Do not secure the hair samples to a ____ because this will damage the hair.
piece of paper with scotch
All ______ should be removed from the submitted specimen.
foreign fibrous debris
_________ hairs are not suitable for examination.
Fragmentary hairs or underdeveloped
Areas on an object containing hairs should be protected with __________ over the area before wrapping the object from transmittal to laboratory.
cellophane or paper taped
Methods of packing hair:
Pill box or test tube.
Questioned specimens ______ powder papers.
druggist
Properly folded, sealed and labeled.
PRESERVATION OF SPECIMEN
____ containing all the papers with hair and fibers
Big envelope
– This refers to a specialized ephitilial outgrowth of the skin which occur everywhere on the human body except on the palm of the hands and the sole of the feet.
HAIR
-It is an appendage of the skin.
HAIR
___ is not completely round but may be oval or flattened.
HAIR
-Its width is not always the same along its length.
HAIR
-It starts out pointed and narrow and then strays or less the same.
HAIR
-Hair is not completely round but may be
oval or flattened.
– This refers generally to long and stiff hair.
REAL HAIR
TWO KINDS OF HAIR
- REAL HAIR
- FUZZ HAIR
– This refers generally to short, fine at times curly and wooly hair
FUZZ HAIR
PARTS OF THE HAIR
- Root
- Shaft
- Tip
– This refers to portion of embedded in the skin.
Root
– This refers to portion above the surface of the skin.
Shaft
- It is the most distinctive part of the hair.
Shaft
– This refers to distal end of an uncut hair shaft.
Tip
HAIR is what kind of evidence?
corroborative or circumstantial evidence
-It is refers sometimes to point.
Tip
PARTS OF THE SHAFT
- CUTICLE
- CORTEX
- MEDULLA OR CORE OR MEDULARY INDEX
– This refers to the outermost covering of the hair.
CUTICLE
-It is consists of one layer of non – nucleated polygonal cells which overlaps like the scales on fish.
CUTICLE
– This refers to the intermediate and the thickest layer of the shaft and is compose of elongated, spindle shaped fibrils which cohere.
CORTEX
-They contain pigment granules in varying proportion depending on the type of the hair.
CORTEX
– This refers to the central canal of the hair that may be empty or may contain various sorts of cells more or less pigmented and begins more or less near the root.
MEDULLA OR CORE OR MEDULARY INDEX
Certain hair has medulla. Therefore hair can be classified into two categories namely:
- HAIR WITHOUT MEDULLA
- HAIR WITH MEDULLA
one straight black line
CONTINUOUS
more medulla than empty space
INTERRUPTED
more empty space than medulla
FRAGMENTED
black, no color visible
SOLID
no line; color visible
NONE/ABSENT
MEDULLA can be I-C-F-S-N/A
interrupted, continuous, fragmented, solid or none/absent.
-Before performing the examination take note of any foreign material on the hair and should be identified if present in sufficient quantity.
MICROSCOPIC EXAMINATION OF HUMAN HAIR
-HAIR should be cleaned with a mixture of equal parts of ______
alcohol and ether.
– This can be examine using the naked eye or under the microscope.
COLOR
– This refers to the brownish – black pigment in the hair, skin, etc.
MELANIN
-It is the chemical responsible for the color of the hair.
MELANIN
____________ differs only on the amount of melanin.
Black and brown haiR
_____ is thought to be due to iron.
Red hair
– _______ may show whether a hair has been cut.
Tip of the hair
_________ become rounded from rubbing against the cloths.
Tips of body hair
-Hair of human usually shows a
fine tip
do not five much information as to the origin of the hair.
root
is a direct evidence provided that it has DNA
HAIR
