Trace evidence Flashcards
What does a hair with a root w/ follicle attached imply?
Hair was forcibly removed
What does a hair with a root w/o a follicle attached imply?
Naturally falling out
Which end of a hair (distal or proximal) has a tip
Distal
Which end of a hair (distal or proximal) has the follicle
Proximal
What does a hair with a postmortem root band imply?
Hair was originated from a decomposing body
What is another name for the postmortem root band
Dead man’s root
What is the formula for calculating a medullary index
Width of medulla/Width of strand
What does a hair with a linear tip imply?
Haircut w/in the past two weeks
What does a sharp angle on a hair tip imply?
Razor haircut within the past 2 weeks
What does a curled and blackened/burnt hair imply?
Been in/near fire or high heat
What does an abraded end of a hair imply (ripped)
Hair got caught on something
What does a rounded end of a hair tip imply?
No recent haircut
What does the split end of a hair imply?
Dry hair, or no hair cut in over 6 months
What does a hair that looks “scratched” imply?
Treated with a harsh chemical (dyed)
How do you tell if a hair is dyed?
ALL of the hair is the color of the dye
How do you tell if a hair is of its natural color
Medulla is very dark
How much does a hair grow (time wise)
1/2 inch per month
Is trace evidence class or individual evidence?
Class evidence
What is classed as Mineral
Glass, asbestos
What is classed as animal
Silk, wool, fur
What is classed as vegetable
Cotton, linen, hemp
What is classed as synthetic
polyester, Nylon, acrylic
Fibers–>threads–>?
fabric
What is polyester classed as?
Synthetic
