Mod 49
Hair, Fibers, Nutrients, Soil, Glass, Paint, Plant are all what kind of evidence
What are trace evidence
Fibers are lifted from clothing by using tape, tweezers or
What is a vacuum
Crime scene investigators must carefully ___________________, ________________________, collect and protect evidence.
What is document and photograph
On the side of the impact of a bullet, the hole would be clean. On the side opposite the impact, a small ___________ shaped plug of glass would be knocked out.
What is a cone
Paint consists of four parts
What are Binders, Extenders, Modifiers, Pigments
Name Two types of Fiber
What are Natural and synthetic
Glass is made by heating a mixture of ________________ limestone, and _________________
What are sand and soda
Locards Principle is generally known as what?
What is the transfer process
If there are multiple bullets or other objects break the glass, investigators can often determine what?
what is the order they struck
The most common paint samples that are submitted to most crime labs for evaluation come from ___________________
What are Automobiles
Most common natural type of fiber
What is cotton
A shard of glass from a car windshield or headlamp can help identify what?
What is the make, model and year of a car
Trace evidence is predominantly _______________ evidence.
What is class evidence
________________ fractures caused by a second impact typically don't cross fractures from the first impact.
What is radial
Pollen grains are tiny and people rarely notice, yet they are what
what is Highly Distinctive
A natural fiber that is derived from minerals that is used for fire retardant and was used in shingles, tiles and to cover piping in buildings is
What is asbestos
How do you compare two glass samples?
what is densities using bromoform and bromobenzene
Locard's Principle is the main reason each crime scene is _______________________ and ________________ to it controlled.
What is secured and access
The Principal of the Hewes Educational Center name is
What is Mr. Mihalko
The hair shaft is made up of three parts, the medulla, ___________________, and ____________________
What are the cortex and the cuticle
After four hours, _________ percent of fibers clinging to the clothing of a victim or suspect are lost and after 24 hours ____________ percent are gone.
What is 80 and 95
Stress fracture lines that radiate from the impact site are called __________________ lines
What are conchoidial lines
A piece of Hair at a crime scene must contain what part of the hair to be considered Individualized Evidence and prove without a doubt that it belongs to one person.
What is the follicle or root
The place at a crime scene that the crime was committed is called what?
What is the focal point
The distribution patterns in the hair that can determine race, and can match known and unknown hair and identify sources is in the __________________________ portion of the hair shaft.
What is the Cortex