Forensics Week 10 Flashcards
What are friction ridges
evolutionary adaptation to grasping and climbing
What are the three levels of ID
General patterns; anatomical source
Individual ridge paths; deviation, size, shape
Individual ridge structure; pores, ridge shape
What levels of ID can individualize
only 2 and 3
What is the minimum number of points for ID in australia
There is none
What are patent fingerprints
immediately visable to the naked eye
What are latent fingerprints
not able to be seen by the naked eye
What are 3 ways to visualise fingerprints
Powder, Alternating light sources, developing agents
What is hair mainly made up of
keratin
Where it eh pigment located in brown hair
near cuticle
Where is the pigment located in red hair
near the medulla
Where is the pigment located in blonde hair
There is almost none
What can forcibly removed hair sometimes have attached
skin tags
how to idetify facial hair
Thick and sometimes doubled medulla with irregular cross section
How to identify pubic hair
Wide variation in diameter with buckling along length and broad continous medulla
Do hair and nails keep growing after you die
No, dehydration shrinks the skin
What two substances out compete oxygen for haemoglobin binding
Carbon monoxide and cyanide
What coloured in cyanide poisoned blood
Bright red
What cyanois
Blue tinge to the skin after Carbon dioxide induced suffocation
What are five ways to trace blood at a crime scene
Location in three dimensions Location of other objects Method of deposition Time Post-depositional disturbance
What does medium velocity impact splatter result from
Beating or a stabbing
What does high velocity impact splatter result from
Gunshot or industrial machinery
What are 6 patterns that can occur during body deposition
Skeletonised stain Fly spots Drip pattern Wipe Swipe Transfer/Contact
What turns pink in the presence of blood
Kastle-Meyer test (Small testing)
What turns blue in the presence of blood
Luminol
What counts as body fluid
substance of any biological origin
Who founded toxicoogy
Paracelsus
What is elemental poisoning
Easy to detect as it does not break down in the body
Forensic toxicology plays a role in
Cause of death
Illegal drug use
Minor drug infractions
What is forensic profiling
characterising of a criminal by behavioural, mental or scientific means
Who first introduced the concept of DNA profiling
Alec Jefferys
What do STR stand for
Short Tandem Repeats (used in DNA profiling)
If DNA is matched at the scene, what does it mean
The match MAY have contributed
What DNA sample is small, what can be done
PCR
