Question

why is hair mostly considered class evidence? without the follicle, it cant be linked to an individual its characteristics can be linked to a certain class of people hair can only indicate a racial group/sex/age; and therefore can only be matched to a class of individuals all of these are true the hair shaft is composed of the cuticle, cortex, and * root follicle medulla crown the body of a woman was found in the woods. some hair fibers found on the body were sent to the crime lab for analysis. the ends of the hair attached to the body were gray, but showed that it had been dyed. the distance from the root of the hair to the beginning of the dyed area measured 8mm. investigators determined that the victims hair had last been dyed on august 1, 2004. assuming the hair grows at a rate of 0.44mm per day, approximately what date did the woman die? august 4, 2004 august 19, 2004 august 18, 2004

Explanation:

1. First question

Hair without the follicle lacks DNA - rich material for individual - linking. Its characteristics like color, texture can link to a class of people such as a racial group, sex, or age group. So all the given reasons are valid for hair being class evidence.

The hair shaft is composed of the cuticle, cortex, and medulla. The root and follicle are associated with the base of the hair where it attaches to the body, and the crown is not a part of the hair - shaft structure.

Step1: Calculate the number of days

We know the distance from the root to the start of the dyed area is $d = 8$mm and the hair - growth rate is $r=0.44$mm per day. We use the formula $n=\frac{d}{r}$, where $n$ is the number of days.
$n=\frac{8}{0.44}\approx18.18$ days

Step2: Determine the date

The hair was last dyed on August 1, 2004. Adding approximately 18 days to August 1, 2004, we get August 19, 2004.

Answer:

D. all of these are true

2. Second question