Trace Evidence

Why is trace evidence known as class evidence? (what does it tell you)

• can excluded you but not absolutely implicate you as a suspect

• can make you guilty

• transfers difficultly

• easily transferrable

What is dirt composed of?

• sand, sleet, snow

• sand, silk, clay

• clay, salt, ice

• dirt

What are two pieces of information that dirt can tell you?

• movements and whereabouts of the body

• leading to place of employment

• lead to the place you work at with a bomb

• dirt making you messy

How would you collect fibers?

• tweezers, vacuum into filters, using tape

• only using tape because it is the best option

• tweezers will get out your splinters

What are the two types of fibers and what are examples of each?

• natural - polyester, rayon nylon

• natural - cotton, cashmere, mohair, silk, wool

  synthetic - polyester, rayon, nylon, acete, acrylic, spandex

• synthetic - cotton, wool, mohair

• there is no fibers

What are the characteristics of fibers that might be useful?​ ​ ​ ​

• natural or synthetic
• color
• how it looks
• twists or kinks
• length of individual strands

What information can you get from a hair sample?

• if your body removed it from the situation

• hair ethnicity; hair products used

• - which part of the body it came from; help determine if the hair was plucked or just fell out

• HAIR PLUCKING!!!!

What are the three parts of hair? 

What is the cuticle useful in identifying?

Which part of hair is the color pigment located? 

• hair follicle

• cuticle

• medulla

• cortex