I've got a Hairy Fiber
If a fiber is found at a crime scene, it is trace evidence. If it is determined to be red polyester, it becomes this.
class evidence
The 3 types of fingerprints people can have
Loops, whorls and archs
The four different blood groups are
A, B, AB and O
The caliber of the bullet is this
What is the diameter
Locard's principle states-
when two things come into contact, trace evidence is exchanged
The 3 main parts that make up a hair
medulla, the cortex, and the cuticle
Which fingerprint pattern doesn't have a delta
Arches
What is the most common blood type
O Blood
The path a bullet takes is known as this
trajectory
Provide 3 reasons eyewitness testimony is faulty
Bias, emotional state, brain fills in gaps, we ignore things we don't think are important, distractions, poor lighting, time between event and recall
What was the significance of trace evidence in the Atlanta Murder case/Wayne Williams case
The unique trilobed, green carpet fiber and dog hair helped police convict Wayne Williams
The three types of prints found by investigators at a crime scene are these.
Patent, latent, and plastic prints?
What blood type is considered the universal donor blood type that anyone can receive
O negative blood type
This is the reason gunpowder is good for firearms
it expands to 6xs its volume when ignited
Three pieces of evidence that seemed to indicate OJ's involvement in the murder of Nicole Simpson and Ron Goldman
cut on his finger, shoe print found at crime scene, his blood at crime scene, Nicole's blood found on the Bronco, past violent behavior, bloody glove at his house, blood on his socks,
The color or pigment for a hair is found in this part of the hair shaft
The cortex
Crime scene prints that are seen without dusting are called these.
Patent or plastic fingerprints?
Cell in the blood is responsible for clotting and preventing excessive bleeding
Platlet
These are three of the identifying markings left on a semi-auto shell casing
Breech face stamp, firing pin impression, ejector marking
the most common fiber used to make polar fleeces
polyester
Animal hair will differ from human hair. These are two of the reasons
bigger medulla, bigger medullary index, darker, thicker (usually) and more pigment
What percent of people have whorls (within 5%)
30% percent
This substance, found in red blood cells that is responsible for carrying oxygen throughout the body
Hemoglobin
These are the three things you can learn from examination of an undamaged, fired bullet
Number of lands and grooves, twist direction, caliber of bullet, grains in the bullet, type of bullet
The category of fiber made when natural materials are used to make a new and different fiber
regenerated fiber