Hair structure
Crime Scene Analysis
Eyewitness Testimony
Handwriting Analysis
Fingerprinting
100
These are proteins that form the main structure of hair.
Keratin
100
What is forensic science?
Using scientific knowledge to help solve a criminal investigation
100
What type of evidence is eyewitness testimony?
Testimonial evidence
100
What is an exemplar and why is it used?
A known writing sample that is used to compare to a sample being examined
100
True or False:
Everyone has unique fingerprints, unless you are an identical twin.
True
200
Pigment found in the cortex of hair.
Melanin
200
What is evidence?
the available body of facts or information that indicates whether a belief or proposition is true or valid.
200
True or False: eyewitness testimony is the most reliable type of evience.
False
200
How might an exemplar be obtained?
Court ordered or voluntarily given.
200
When do fingerprints form?
When in the womb
300
This is the outer layer of hair that has overlapping scales.
Cuticle
300
What is the difference between a primary crime scene and a secondary crime scene?
oPrimary Scene – The original location where the crime occurred.
oSecondary Scene – An alternate location where evidence may be found.
300
Name three factors that could influence a person's ability to remember details of an event, and therefore recollection of a crime? (to do with the person rather than the crime)
The age or race of the eyewitness
Whether or not the eyewitness is under the influence of drugs or alcohol
How long ago the event occurred
The way the event is portrayed in the media
300
What is the difference between class characteristics and individual characteristics?
- Class characteristics – writing habits learned as kids by copying examples of letters. These habits carry over into adulthood.
- Individual characteristics – unique features due to nerve and motor skills that develop when writing becomes subconscious
300
What are the three types of fingerprint patterns?
Arches
Loops
Whorls
400
This is the inner layer of hair that is made of keratin and contains pigment.
Cortex.
400
What are the three types / categories of evidence?
Testimonial
Physical
Trace
400
What is a facial composite?
Sketches of a person's face made by a sketch artist from information provided by an eyewitness
400
What are two ways that deception can be avoided?
oWriting a set dictation
oSuspect should sit in a comfortable chair without distractions.
oNever aid the writing of a suspect
oSuspect given a pen and paper similar to the questioned document
oDictated text should contain similar word and letter combinations
oDictated text should be written at least 3 times
oSignatures should be requested on about 20-30 checks
400
What is the most common fingerprint pattern?
Loops
500
This is the inside layer of hair that runs down the cortex.
Medulla
500
What is an example of testimonial evidence?
Any form of verbal or written evidence given to posice or in court. Often providded by someone who witnessed the event.
500
Why is eyewitness testimony said to be unreliable?
Because memories change over time.
500
How many characteristics of handwriting are analysed when analysing a sample?
12
500
What is one way that fingerprints can be obtained from a crimescene?
Powders
Iodine
600
When do hair follicles begin to form?
22 weeks in utero
600
What is Locard's Exchange Principle?
Every contact leaves a trace
600
What factors of a crime can influence an individual's recollection of a crime?
Time of day the crime was committed.
Who was at the crime scene.
How traumatic the crime was.
How attractive the people were.
The level of familiarity with the area the crime was commited.
600
What type of fingerprint pattern is shown?
Plain arch