Forensic Hair

What kind of medulla is this?

• Fragmented

• Continuous

• Interrupted/Intermittent

• There is no medulla - Absent

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

• Fell out naturally

• Was forcibly removed

What kind of medulla is this?

• Interrupted/Intermittent

• Continuous

• Fragmented

• There is no medulla present - Absent

The following medullary pattern is called

• fragmented 

• continuous

• interrupted/intermittent

• There is no medulla present - absent

A young child is kidnapped from her school playground. Shown below is a reference sample of the kidnapped child's hair. The only cars that left the parking lot before the child was discovered to be missing were those of four cafeteria workers. The car of each worker was searched below. Which recovered hair, if any, is consistent with that of the victim and warrants further investigation?

• Worker A

• Worker B

• Worker C

• Worker D

Tags

NGSS.MS-PS1-2

The most important structure for the individualization of hair (identity).

• Medulla

• Cuticle

• Cortex

• Follicle

What is the medullary index for a human hair?

• generally less than 1/3

• generally equal to 1/3

• generally more than 1/3

• generally greater than 1/2

Which of these cannot be determined by hair

• gender

• human or animal

• race

• manner in which hair was removed (shed or pulled out)

We know hair is from a human if…

• The medullary index is 0.5 or greater           

• The medullary index is 0.33 or less

• The cuticle is coronal

• The medulla is fragmented

The transfer of evidence such as a fiber from a source to a person, and then to another person.

• primary transfer

• secondary transfer

• monomer

• polymer