Evidence
To rule out certain suspects or scenarios, or to corroborate other physical evidence
What is the benefit of using hair as evidence?
A hair consists of these two parts
What are the follicle and shaft?
The number of hairs we typically shed in a day
What is 250?
Three characteristics of the cuticle of a hair
What is transparent, protection, and overlapping scales?
What is the recommended method for gathering hair from a suspect?
The type of evidence that hair is considered to be
What is class evidence?
The part of the body where the hair is actually produced
What is the follicle?
The number of hairs that are shed specifically from our head in a day
What is 100?
The largest part of the hair shaft
What is the cortex?
A test that identifies up to 14 different elements in a single 2 cm strand of hair
What is Neutron Activation Analysis?
Hair that adheres to clothes, carpets, and other surfaces and is transferred to other locations
What is secondary transfer?
The network of blood vessels found at the end of the follicle
What is the papilla?
The number of hairs that are desired for collection from a suspect
Part of the hair that is hollow or might be filled with cells
What is the medulla?
The type of evidence that DNA is considered to be
What is individual?
Three ways hair may be collected from a crime scene
What are gloves/forceps, tape lift, and vacuum?
The protein that is found in the shaft of the hair that makes it strong and flexible
What is keratin?
The number of hairs that are collected from a suspect's head and pubic region
What are 50 (from the head) and 25 (from the pubic region)?
The stage of hair that is associated with active growth
What is the anagen phase?
What is a comparative characteristic?
Differences in hair can be used for identification or ____________ in forensic investigations
What is exclusion?
The three layers of the hair
What are the cuticle, the cortex, and the medulla?
The rate of human hair growth over a one month period
What is 1.3 cm?
The macroscopic characteristics of hair
What is length, color, and curliness?
Two things that can be determined through hair analysis
Answers will vary
These two things can be determined if a follicular tag is present
What is DNA and blood type?
The three basic structures of the cuticle
What is coronal, imbricate, and spinous?
The number of days that drugs can be detected in hair after use
What is 90 days?
What are the microscopic characteristics of hair?
What is the pattern of the medulla, pigmentation of the cortex, and types of scales on the cuticle?
Three more things that can be determined through hair analysis
Answers will vary