Hair and Fiber Evidence

How does the amount of fibers found at a crime scene affect the significance of said fibre.

• It will increase the significance of the fibre because there is a bigger chance there was contact.

• It will do nothing to the significance

• It will decrease the significance because we are looking for rare fibres

What is catagen?

• The final stage of hair growth

• The outer layer of keratin

• Transitional phase where hair growth slows

• A plant fibre

In order for hair to be considered individual evidence it must contain

• a complete medulla
• cells in its cortex
• nuclei in the cuticle
• a follicle

You can get DNA from a piece of hair that does not have the root attached.

• True
• False

hair always contains DNA

• true
• false

Did this hair fall out naturally, or was it forcibly removed?

• Fell out naturally
• Was forcibly removed

This is the beginning phase of hair growth... 

• Anagen Phase
• Catagen Phase
• Telogen Phase

Final phase of hair growth...

• Telogen Phase
• Anagen Phase
• Catagen Phase

Which aspect of fibers make them difficult to use as evidence in an outdoor crime scene?

• they are difficult to identify
• they are easily contaminated by other fibers
• they are easily destroyed by light
• they are easily blown away

What is Loccard's Exchange Principle?

• Perpetrators always leave evidence behind.

• Every contact leaves a trace.

• All touches leave evidence.

• Long, violent confrontations leave evidence.