Forensics
What is forensic science?
Using scientific methods and techniques to solve crimes
What is DNA?
A biological (part of a living thing) sample that is unique to every living thing.
What are the 3 kinds of fingerprints?
Loop, Whorl, Arch
____ can prevent contamination of suspect/evidence collection.
Gloves
What do fire investigators do?
Study fires to find the cause
Person who may have committed crime
The suspect
Which of the following would not contain DNA: skin, hair, thread
thread
For what group of people was the first data base of fingerprints set up?
USA Army
Is eyewitness testimony reliable?
NO
What is charring?
After fire has consumed the material (object) it is charred.
What does a field scientist do?
Collect evidence/present at the actual scene
True or false: urine contains DNA
True
What are 2 methods of recovering fingerprints?
Powder and super glue
Name 3 categories of evidence.
Physical: Weapons, tool marks, broken items
Biological
Trace
Impression
Digital
Document
What does a V pattern show
Point where the fire started
What type of evidence is blood?
Physical, DNA evidence
How do forensic scientists stop their own DNA from contaminating the scene?
Wear PPE (must say more than just gloves!!)
What surfaces are best to collect finger prints with the powder method (must name 3)
smooth, flat, glass, plastic, hard, wood, leather
What is rigor mortis?
Stiffness of the body in the first 24 hours after death
What does the line of demarcation show?
The path the fire travelled.
Name a search technique that can be used to search a crime scene?
Spiral, Zone, Grid
Explain why DNA evidence was not used to catch Jack the Ripper
The forensic science of matching DNA hadn't been discovered yet
What type of surface does super glue help to "see" fingerprints? (Name 2)
paper, material, cardboard, textured, soft, pliable, flexible
How is entomology used in forensic science?
Studying insect behaviour can give the time of death.
To what temperature can a fireman's suit withstand heat?
700o Celcius